Forum Replies Created
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Replies
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25 or 2.5mm ?
25 or 2.5mm ?
Yeah, they’re talking about
Yeah, they’re talking about two different things – WelshBoy specifically said gear size, Mr Sheds is talking about torque, as it were..
Don’t worry about a ‘wide-narrow’ ring, waste of time and money, not seeing any evidence that a std ring will ship the chain.No, not vital but…
(a) He’s going on the PR cobbles, not your average British road, plenty of folk have recommended chain catchers, clutch mechs or NW rings for it in the past.
(b) They work
(c) They’re cheap and sounded like he’s getting a new ring anyway
40, 42 or 44 should be fine –
40, 42 or 44 should be fine – depending on your strengths you might spin a bit with the 40 if you’re in a big-ish group on the flat, but 40 x 11 @ 90 rpm is ~42km/h already. I guess a 44 might make the chain-line a bit better, getting a narrow-wide is probably more important though, dunno – love to, but not done PR (yet). Here’s a quick couple of figures.
Yeah and nah – can’t say i’ve seen a site that actually bases their figures on the acceleration due to pedalling, generally seem to be an average power / VAM calculation which gets more simplistic the higher the grade/lower the cadence ; then again, would the better analysis come up with anything that makes a radical difference ?… almost certainly not.Several studies have been done on precisely this, and found that the effects of weight at the rim compared to weight of the whole bike are negligible. Remember, if you are accelerating the rim, you are accelerating the entire bike and rider, so your numbers come back to similar to what John S is discussing above.
Yep, agree with most of that – my issue was whether it could be detectable and that the sites don’t take into account the acceleration of the bike/rider with the pedal stroke, just overall speed etc.
Can we have more info on the actual route? It looks like the lady that took the bus had to get a bus to the start, so she was later than the others? Is that fair?I imagine they waited for her to get there before starting.
Ironically, the bus route will have been on the Metrobus, the brand new, hyper-expensive bus route that is still slower than cycling.
IIRC Metrobus was originally touted as being more or less a guided bus system, with dedicated routes etc; it ended up being too expensive to do that so the bulk of its routes are just on the normal roads, with the rest of the traffic, just like a ‘normal’ bus. I did see a Metrobus on the new busway by Ashton Gate the other day. Its a bit like seeing some rare bird: I imagine that bus-spotters werelined up to take serial numbers…
I see a lot of them around Ashton, passenger number in them look decent – early morning / evening obviously, but see a fair few people outside that when i’ve been around. From what i’ve heard indirectly from people that have used that route, seems well regarded.
They were going to be predominantly fully guided, that was really never going to fly, and are mostly on the road but in bus lanes (some ‘special’ ones’) for much of the routes i’ve seen. It’s been a right comedy show getting even what we’ve got so far, but they seem alright – not tried yet, will next time I need to get back from Aztec without bike/car.
Yeah and nah – can’t say i’ve
Yeah and nah – can’t say i’ve seen a site that actually bases their figures on the acceleration due to pedalling, generally seem to be an average power / VAM calculation which gets more simplistic the higher the grade/lower the cadence ; then again, would the better analysis come up with anything that makes a radical difference ?… almost certainly not.
I did wonder
I did wonder 😉
Whatever. Why are your
Whatever. Why are your knickers so bent out of shape ?
Gallium is my favourite for certain locks, but needs a little more time.Aluminium locks only?
Aye, but oh so pretty.
Gallium is my favourite for
Gallium is my favourite for certain locks, but needs a little more time.
He was in the large part of
He was in the large part of the peloton that got caught up in a crash right at the start of stage 5 that took a while to sort out – big group, with Froome in, came in about half and hour behind the winner.
I’ve had absolutely no issues mixing and matching chainrings however that was swapping a 50/34 for a 50/36, so reducing the teeth difference.Shimano tend to be very conservative with their recommendations, so I don’t think 52/34 wouldn’t work, but the jump would be relatively massive between the two chainrings – so I can’t imagine it’d feel great.
If you want a larger range of gears, Shimano’s new R7000/8000/9100 gives you the ability to use an 11-34 cassette, so you don’t need to have a great big jump between your front chainrings.
TBH i’m struggling to think of any remotely recent Shimano mid-cage rear mech that wouldn’t cope with an 11-34, 10- or 11-speed. I’ve also been running one with an RD-6800 GS for over a year and it’s been flawless, and without any adjustment, e.g. B-screw, apart from a new chain as the old one was knackered (added 2-links over the one set-up for 11-28/32, but looking at the angles i’m not sure it was entirely necessary).
It’s the pair…Cheers mate, just wanted to confirm – late birthday present I think..
Whoa. @Pilot Pete – do you happen to know off the top of your head if that’s for a pair ? I also like that they have a super-long length – would be perfect.The link he provided would indicate yes.
That what my confusion was from, doesn’t explicitly say how many spindles ‘1’ in the order implies. Given what they are, 39 euro could be one or two although hopefully the latter.
