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Cassette help please!

Hi all, I'm new around here so hello - and go easy on me!

I've got some events lined up for when summer arrives, namely the Dartmoor Classic and Etape du Tour and hills are not my forte (strange choice of events given my weaknesses, but they're the ones we're meant to target right!?). I have a compact chainset and 11-28 cassette. My question is how bigger cassette (sprocket) can I squeeze in on my 105 (5700 short cage) rear mech? Was wondering specifically if a 11-32 would fit and whether the real world gains would be significant?

Any help appreciated,

Kev

If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.

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Hensteeth | 9 years ago
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Well I have been out on the new carbon bike with 12-28 cassette (as opposed to previous 11 - 32 alloy bike) and done a bit of hill work. 50 miles with 2000ft of climbing, including 4 fords and one cat 4 hill. It is a route I have done quite often, and it is always quite hard but I can ride it all no problem.
The new bike is definitely faster all round but I thought I was having to push harder on the hills, although I haven't done any hills for a while so am no doubt rusty!
However when I got back and looked at Strava it turns out I had new PR's on all the hills and other segments, knocking minutes off some of them.
So it just shows how true the old saying is " it doesn't get easier you just get faster"!
Definitely feel better for pushing the bigger gear.
Got the "Durham Beast" this weekend so will see how I feel after that!  17

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pablo | 9 years ago
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Choose the equipment that suits the situation for you not what's fashionable.
I run 11-25 on a compact (mainly flat area) but if I know i've got some Cat 3 & 4 long climbs i'll swap to my 12-30 takes five minutes to do with practice. I also have a tripple which i've never got on with but if i was doing a mega climb and the gearing worked out lower i'd be walking past the carbon. The only way you'll be decent at climbing is to practice and be as light as you can.

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Royal1664 | 9 years ago
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Would it be possible to take the 12t of a 12-30 cassette and replace it with an 11t so you would have a fast 11-30 cassette that could climb??

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5th | 9 years ago
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As far as gearing goes, run whatever you want that enables you to do the riding you enjoy. My mate runs either a double or triple depending on where he's riding and at least an 11-28 cassette, sometimes bigger; but he'll freely admit to being short, fat and unfit. I run compact and 12-25 (commuting) or 11-23 (racing) and can get up any hill up including 1:3s where I'm chewing on the bar tape, but what works for me would never work for my mate.

As far as the whole 53/39 thing goes, few need bother. I can hit 80kmh+ on 50-12 or 50-11; at that speed your legs are a blur and 53-11 will make little difference. The bonus is that compact and a smaller cassette is both lighter and will give you closer ratios to avoid annoying cadence jumps, both of which matter to me. Why spend £££s on weight weenie bits when you can replace the stuff that wears out with something lighter for the same price?

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birzzles | 9 years ago
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2 points.

1. 52/36 1 speed with 11-32 sees to cover all bases.

2. a 53/39/30 triple is the same as a standard chainset with the addition of a 30t ring if you need it.

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SPIKE718 | 9 years ago
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I "being of a certain age beyond 70" have ordered a 12-30 Ultegra chainset to replace my existing 11-28. My thinking is that it's a relatively cheap way to give me an easier ride up the local hills and it will (hopefully) be a simple exchange. Again, hopefully, I won't have to go down the road of a replacing the rear mech from the existing 6770.
Would appreciate any thoughts or experiences in this regard.

I have since made the change. A very simple swap out. Works very well indeed and the DI2 handles everything.

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Simon E replied to pablo | 9 years ago
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pablo wrote:

The only way you'll be decent at climbing is to practice and be as light as you can.

Pah, cheap talk like that won't sell more carbon to the Mamils  3

Seriously, as pablo says, shedding the lard and climbing hills are the only two things that really make a difference.

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Yorky-M replied to Royal1664 | 9 years ago
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it is no problem, as long as the 11 is a lock ring. and 11 can jump up to a 13 (second) sprocket with ease. Sram have an amazing 10T on the market.

But are you really going that fast that a 12 isn't enough?
East Germans worked out in the 1990 that 107revs per min was the most efficient. Most modern coaches studding effort vs HR land in the 95-100 range. I can only manage a 90 ave- but 52 by 13 (103 inches) at 100 cadence is kicking above 35mph.

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ldb30 replied to Simon E | 9 years ago
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How true chaps,already shed 50lb,but want my 1st on strava,and have ordered my 11-32 cassette. and 18hrs after group ride with new club,sitting here in office with my legs still aching!!, but at least i slept like a baby!!!.........happy cycling....  29

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ldb30 | 9 years ago
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+2 & -1
i have a new trek Domane that has a compact 12-30, and as much as i love the bike and its gears, i have 2 issues, i would like a bigger gear on rear for help on steep hills,and a small one for the flats and down hills,ideally maybe a SRAM 11-32. Is it worthwhile?,or too similar to bikes standard set up?.......

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CXR94Di2 replied to ldb30 | 9 years ago
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It's worthwhile if you struggle with the 30t getting up hills in your area. For the 11t , how fast do you want to go? I can hit 55 mph without even pedalling on steep hills!

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ldb30 replied to CXR94Di2 | 9 years ago
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CXR94Di2 wrote:

It's worthwhile if you struggle with the 30t getting up hills in your area. For the 11t , how fast do you want to go? I can hit 55 mph without even pedalling on steep hills!

Well,it would be nice to go just a bit faster down hills,like my triple trek?,and i know its less than 10% difference in real terms,but im chasing 1st spot on Strava,and am currently 3rd out of 471!. More importantly ive joined a new cycle club tonight,who have pushed me hard,maybe i just need to concentrate on fitness more??!!........  20

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fukawitribe replied to ldb30 | 9 years ago
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ldb30 wrote:
CXR94Di2 wrote:

It's worthwhile if you struggle with the 30t getting up hills in your area. For the 11t , how fast do you want to go? I can hit 55 mph without even pedalling on steep hills!

Well,it would be nice to go just a bit faster down hills,like my triple trek?,and i know its less than 10% difference in real terms,but im chasing 1st spot on Strava,and am currently 3rd out of 471!. More importantly ive joined a new cycle club tonight,who have pushed me hard,maybe i just need to concentrate on fitness more??!!........  20

Let me get this straight - you spec your cassette so you can do 90+ km/h to grab a downhill Strava segment ?

Each to their own  1

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macrophotofly | 9 years ago
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I read the triple-users comments with interest. I've got a compact for riding in the mountains near me in Tokyo with a 11-26 on the back (and I'm fairly fit for a 40-year old). It's perfect for going uphill (34 front) and downhill (50 upfront is fast enough for me), but rides on the flat around town in winter time are constant swapping between the front cogs and never being in the middle of the rear.
Triple sounds one way to go, but I've decided to go the other .....and re-place the compact cogs on my winter bike with a single 42 upfront. Got one yesterday to fit my exisiting 110 SRAM crank and I'll be going 1x10 this weekend. Interestingly it has the added benefit of allowing the existing RD to be able to take a slightly larger granny on the rear if I needed it. I've got a feeling this will become a far more usable (and also slightly lighter) townie-club bike......

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cbrookes75 | 9 years ago
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Thinking on, if you do get an 11-36 or 12-32 etc etc. You may find the worst that happens is you don't use the easiest gears, in which case you switch to an 11-25 etc. Or you may find if you start with an 11-25 you have to get off and walk, apologies if I am repeating other respondents as I haven't read the entire thread!

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cbrookes75 | 9 years ago
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i just bought a new bike, a Specialized Roubaix, having ridden a cheap halfords "hybrid" for two months with a 30:30 lowest ratio, I said to myself despite my new bike being five to six KG's lower in weight, I wanted the security of at least the same ratio being available to me that had previously been available to me. Ignore the fit people who say "you will manage" and go with your gut. Personally I have yet to use the 30:30 on my new bike, in fact I have not used the 30 ring apart from to come home (as I like to start off in the very easiest gear) but it's there for when I am going up those hideous hills, as I expect to be doing so over the coming weeks! From Selattyn to the Racecourse I am last (on Strava leaderboards) at 24 minutes, but I walked most of that! I hope to cycle the entire length as I have lost about six kg's from the weight I need to drag up that hill! Time will tell, as for folks who say "that ratio should get you up Everest" etc. well we are all different, different strengths and weaknesses play to your strengths and configure your bicycle to play to your strengths!

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WolfieSmith | 9 years ago
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Now prickgate has died down let me bore you with my thoughts on gearing.

20 years ago I was 12.5 stone and would dash up hill and dale for 100 miles using a 36:25.

Now I'm a stone heavier (most of it leg muscle obviously..  4 ) on a campag 34:30 and it's fine. Anymore more teeth would be unnecessary as the my front wheel is lifting off on the 20%'s anyway. Triples are fine. My regular training mate has one. Personally it's a no no on a road bike on aesthetic grounds and because I also race on the best bike with different gears and wheels.

The only problem is a little cog rub from the top of the inside mech cage on one or two lower gears. My mech is 9 years old so the new cassette isn't totally compatible. Something to check if you have an older group set and buying a newer cassette ratio.

As for the weight weenies and young buckos? There will always be someone younger, faster and thinner coming past you on the hills. Once upon a time it would have been me but you can't freeze time - only buy bigger gears. Comfort yourself with the thought that there's also someone faster than every bugger that passes you on the hill and they'll be passed one day.

There's just never a pro cyclist around when you need them to teach someone a lesson...

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Colin Peyresourde | 9 years ago
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Rode a triple while on a cycling holiday (not out of choice). It did nothing for me. The lowest crank gear was a complete waste. It just didn't really give that much of a benefit when dropping down to it. It felt pretty silly. It may have been the choice of gears. I can't remember what they were but it felt like 53/39/34 or some such.

But it is horses for courses. You are probably better off riding a gear which doesn't do lasting cartilage damage. But a compact with a 28 is about what most people need.

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dunnoh | 9 years ago
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Is it possible to get Di2 in 32? I might get that to go with my World Champion Socks and Sky Jersey. Hopefully that alone will try to keep the 'true' roadies from making eye contact with me while out riding.

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CXR94Di2 replied to dunnoh | 9 years ago
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dunnoh wrote:

Is it possible to get Di2 in 32? I might get that to go with my World Champion Socks and Sky Jersey. Hopefully that alone will try to keep the 'true' roadies from making eye contact with me while out riding.

You certainly can, straight swap of cass and gs long cage derailleur.

You can even have a 36T cass with a cage from another shimano mtb derailleur. Or there is a company in the USA that will modify your derailleur with their own design.

I did a quick check and I have nearly the same ratios as a triple, so I am totally happy with my setup.

From a personal point , I wish I could climb up long hills more quickly, but what I tend to lose on the way up I tend to gain back on the down.

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Chris James | 9 years ago
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I'm 11 stone 10 (75kg) and 6 foot tall. As I said, I like my triples better than the compact, and I have owned bikes with both. On these threads there is often an assumption that triples are only for fat lads and pensioners.

To be honest, if you are struggling to get up a hill then your only interest is how low your gears will go. A 30 tooth sprocket on a compact is quite a bit lower gearing than the 25 I use on my triples.

People have strange attitudes towards triples. I go out with a social group some weekends, mostly hilly routes in the Pennines. I am the fastest climber of this group and I often get comments about 'cheating' by using my triple as I overtake people on the hills, even if the person on the compact is packing a 32 tooth cassette and a long cage derailleur. And yet I also get comments about how heavy triples are. So some people seem to simultaneously believe triples are both cheating to make things easy, and also a hindrance!

I do think there is a element of fashion to it. I was out last night on a local run around the hills and everyone looks so pro nowadays (top end shorts, aero jerseys, carbon bikes) even if they aren't that good. Compacts looks more hard-core at a glance, but a professionals compact is 52/36 (not 50/34) and they mostly ride 53/39 or similar.

I get a perverse please out of overtaking people on my steel bike with a triple, especially my winter bike which had guards and a Brooks saddle on it. The fast lads in my club can drop me on the hills, but that is because they are stronger and fitter, not really because of their gearing or clothing choices.

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CXR94Di2 | 9 years ago
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I changed my rear cass to have a 32T also with a gs derailleur. So even if my legs die I can spin up with 36/32 ratio. I too am a big fella weighing 15st, so long hills will always be hard to fly up. Steady pacing wins for me

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LondonDynaslow | 9 years ago
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I am over 90kg. I put a 30t sprocket on to get up Alpe d'Huez, and I did not run out of gears - 34 x 30 is noticeably lower than 34 x 28. This was on my Ultegra short cage rear mech. The Shimano tech dox will say that 28 is the largest tooth capacity but, at least in the case of Ultegra, which as far as I can tell has the same vital statistics as your 105, there is room for a 30t. I understand that this may not work if you have a particularly short rear mech hanger - mine is on a Roubaix if that helps. I'm pretty sure a 32t won't fit though.

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S13SFC | 9 years ago
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Of the lads I ride with we have a mix of triples/compacts and rear cassettes.

Yep we tease the triple riders but they are big lads and need them and climb well.

I've just had a bigger cassette put on, if it makes it easier for me to get up a hill then I'm all for it.

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Chris James | 9 years ago
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I have two bikes with triples, including my favourite steel summer bike.

There always seems to be an assumption that triples are basically mountain bike gearing and bought exclusively to crawl up hills.

My triples have 12-25 cassettes which, with a 30 tooth granny, is about the same bottom gear as a compact chainset with a 27 or 28 tooth sprocket.

I am not a big enthusiast of compact chainsets as the chainrings are similar to triples, but without the most useful middle ring! 34 teeth is a bit low unless you are permanently climbing, and 50 teeth is a bit big except for pan flat or downhill.

For normal rolling terrain compact chainsets seem to spend all their time in really bad chain lines for this reason.

My cyclocross bike has a compact of sorts (46/34), but then again I hardly use the big ring even when racing!

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JudgeDreddful | 9 years ago
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Sorry, I am one of the despised (in some quarters so it seems) unfit types pretending to be a cyclist. I will be the red faced fat bloke you pass when going uphill if you are ever in Gloucestershire. Sorry for cluttering up your roads. I don't know if a Specialized Secteur counts as 'a fancy bike'? I suspect not, it's probably too cheap and not exclusive enough - and it has a shameful girly triple gearset! I might as well wear L plates and get some stabilisers and be done...

Anyway....I'm only 4 weeks in with only a couple of hundred miles covered so far and I read this thread with interest as using the correct gears is still a bit of a mystery to me at times - and hills are my nemesis. I frequently find myself either in the wrong gear to start with or change into what feels like the wrong gear halfway up and end up feeling like my thighs are on fire. As a noob I chose my bike more for the 'relaxed' geometry than the gears, not really thinking I would be doing hills. And I live in Cheltenham, which is basically a bowl with hills on 3 sides - doh!

Still, it must be doing me some good; my trousers are a bit looser and I don't look quite so much like a 'condom full of jelly' in lycra anymore according to Mrs Dreddful. Plain lycra obviously, I'm not so much of a twat that I'd wear a team jersey. Even I have standards....

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cbrookes75 replied to JudgeDreddful | 9 years ago
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JudgeDreddful wrote:

Sorry, I am one of the despised (in some quarters so it seems) unfit types pretending to be a cyclist. I will be the red faced fat bloke you pass when going uphill if you are ever in Gloucestershire. Sorry for cluttering up your roads. I don't know if a Specialized Secteur counts as 'a fancy bike'? I suspect not, it's probably too cheap and not exclusive enough - and it has a shameful girly triple gearset! I might as well wear L plates and get some stabilisers and be done...

Anyway....I'm only 4 weeks in with only a couple of hundred miles covered so far and I read this thread with interest as using the correct gears is still a bit of a mystery to me at times - and hills are my nemesis. I frequently find myself either in the wrong gear to start with or change into what feels like the wrong gear halfway up and end up feeling like my thighs are on fire. As a noob I chose my bike more for the 'relaxed' geometry than the gears, not really thinking I would be doing hills. And I live in Cheltenham, which is basically a bowl with hills on 3 sides - doh!

Still, it must be doing me some good; my trousers are a bit looser and I don't look quite so much like a 'condom full of jelly' in lycra anymore according to Mrs Dreddful. Plain lycra obviously, I'm not so much of a twat that I'd wear a team jersey. Even I have standards....

I just bought a Roubaix that is very similar to your Secteur, I contemplated the Secteur but went for the Roubaix for the better bits and pieces, I am pleased I went for the triple, despite the majority of cycle shops saying "you don't need a triple" It is just nice to have a fall back for that hill you just know you are going to encounter! I weigh about 108 KG just now so a "compact" or worse as far as I am concerned would have been impossible to live with on a serious incline! I am yet to tackle a "serious" incline as I only picked up my new bike today! Though I must say when I looked down at the rings (as I can't see any markers/numbers etc) I was pleasantly surprised to find out what gear I was in!!

As for "Despised" for myself being unfit, I haven't encountered that in my part of the world, just a mutual respect for fellow cyclists! head nodding and smiling etc. which is great for me! I love it! I feel rather inadequate when I encounter the Time Trial mob on a friday evening, but they don't overtake me laughing and pointing at me!!!

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Quince | 9 years ago
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I'm kind of high-jacking this out of curiosity now, but I think it's relevant to the OP; which is an easier/cheaper method of easing up gears: throwing a wider cassette onto the back, or going triple on the front?

The front adjustment would obviously require a new front dérailleur, but if the cassette adjustment required a new long mech thing, that might even out the pricing a bit. Also, can you retain the cranks from a double to a triple?

My gut is with the cassette being easier, but there'd certainly be advantages in to having the range of a triple, and it'd prevent the need for any big jumps on the back cogs, wouldn't it?

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fukawitribe replied to Quince | 9 years ago
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Quince wrote:

I'm kind of high-jacking this out of curiosity now, but I think it's relevant to the OP; which is an easier/cheaper method of easing up gears: throwing a wider cassette onto the back, or going triple on the front?

Easier/cheaper is the cassette (and rear mech/chain if absolutely necessary).

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CanAmSteve | 9 years ago
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The reason compact chainsets and narrow clusters are in fashion is because "that's what the pros ride" - which is about as sensible as running 23mm tyres for the same fashion-following reason (and equally useful).

These forums have a few "The Rules"-following weight weenies who slavishly follow fashion and denigrate recreational cycling (which just happens to be way more popular with way more people - but they are out riding and not writing).

Triples work fine, MTB gears work fine, too. You might even prefer (gasp!) a flat bar and not a racer drop bar. Maybe some people live in East Anglia and have to look up "hill" on Wikipedia, but there are plenty of steep climbs in the UK - often just pushed straight up a hill and over with no switchbacks as you find in real mountains - making them tougher climbs.

If you think a wider range will help, by all means give it a go. Shimano Tiagra, 105 and Ultegra can all handle 30 tooth rear cogs (with the correct RD) and usually 32 will work. If you intend to swap wheel/cluster combos keep in mind chain length - you may need another chain (use QuickLinks) to match.

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