Forum Replies Created
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So I still see no strong evidence that the seat-belt law had much beneficial effect, and there’s some evidence that overall it had a negative effect on safetly for those outside the vehicle.
Isn’t the Harvard study carried out in the US the most relevant source of “evidence”?
I say this because they specifically looked firstly at actual seatbelt usage rates, rather than the date laws were passed, and they looked specifically for risk compensation factors (the Peltzman effect), and concluded “we conclude that the effect of usage rate on non-occupant fatalities is nonpositive, and that there is thus no support to the Peltzman effect”
There is no right or wrong
There is no right or wrong answer to the broader question, it depends on the circumstances. In this case, when you have vouchers to spend, any reasonable LBS would understand your position, and also understand that it is better business for him to fit the parts at a price, than to turn you away. I bought a £2.5k bike from my LBS, and he actually advised me to buy the pedals online, and he fit them.wicksy5508 wrote:
No its not ok.
Would you go Kwik Fit with tyres and ask them to fit them?
Yes! Kwik Fit have a standard rate for fitting tyres you take along, and they are happy to do so.Welsh boy wrote:
Why are you guys quoting your body weight when talking about chains? It is the power you generate which is importantI note you don’t understand the relationship between power, energy, and time. ie in climbing a hill, a 100kg rider gains 25% more potential energy than an 80kg rider, and therefore needs to put the same power level as the lighter rider through the chain for 25% longer to reach the top, or 25% more power for the same time, hence more chain wear. Same applies to acceleration – at 20mph the heavier rider has gained a greater kinetic energy, and therefore needs to put more power / same power for longer, to reach that speed. Greater weight, greater chain wear, every time.
So you are telling me that if I climb a hill slowly I will do more damage to a chain than someone like Bernal or G climbing that same hill very quickly. Really? Are you sure?
No, I never mentioned G or Bernal. I seriously doubt whether you could apply the same 400w as them however. What I said was clear. A heavy rider climbing at the same power as a lighter rider will put the same power through the chain for longer to get to the top, and therefore wears the chain more. I take it you didn’t do physics at O level.Why are you guys quoting your body weight when talking about chains? It is the power you generate which is importantI note you don’t understand the relationship between power, energy, and time. ie in climbing a hill, a 100kg rider gains 25% more potential energy than an 80kg rider, and therefore needs to put the same power level as the lighter rider through the chain for 25% longer to reach the top, or 25% more power for the same time, hence more chain wear. Same applies to acceleration – at 20mph the heavier rider has gained a greater kinetic energy, and therefore needs to put more power / same power for longer, to reach that speed. Greater weight, greater chain wear, every time.
Welsh boy wrote:
Why are you guys quoting your body weight when talking about chains? It is the power you generate which is important…….. BMI is not an indicator of power and so chain wear rate.
I don’t think it’s that simple. You can put the same power through a chain by running a high cadence in a low gear, as you do with a low cadence in a high gear. To say that chain wear will be the same in each case just because power is the same doesn’t stack up.I am about the same height
I am about the same height and weight as the OP. The only cleaning I do is a wipe with a rag (following the KMC advice not to use solvents). I lube with Mucoff ceramic every ride. Typical ride is 50 miles with 1000m of elevation gain, and 1000m of descent (I am lucky enough to live in the Vaucluse where if you aren’t ascending at 7% you are descending at 7%). All that climbing works a chain pretty hard, though mine rarely get wet. I use KMC chains on Ultegra drivetrain. I change after around 3000 miles at which point my chain measuring tool has not dropped.
Back in the day, I lived in Scotland and tried wax lube for a while. Chains lasted about 500 miles because the wax set hard as soon as it touched the chain, didn’t penetrate, and peeled of on the first few rotations. I am now a believer in decent lube!
zero_trooper wrote:
….. And another one that wont talk to the OP’s existing cadence (ridesense) and hrm sensors. Keep up at the back!SigmaSport, most reliable company in terms of bike computers IMO, always accurate and reliable they;ve been doing it for 30+ years.
Here’s a decent one for less than £25 https://www.ebay.co.uk/itm/Wired-Bike-Computer-SIGMA-BC-16-16-NFC-Android-Premium-Line-Waterproof-IPX8-UK/183859647837?hash=item2acee3955d:g:830AAOSwd8hdEN7v
Well the OP was hardly clear what they wanted the computer for.
I take it from your comment that they need something to record/display their cadence and HRM data. Anything else?
To be fair, he says clearly in his post that he has ridesense and hrm sensors.Interesting the way people on
Interesting the way people on here condemn Claris. My second bike, ridden a couple of times a year is Claris. My best bike is Ultegra RD8000. The rear derailleur on the Claris is a tad slower, but gives very precise, solid, changes, is easy to set up to run silently, and rarely needs adjustment. I find setting up the Ultegra to run silent across the range a constant faff. The Claris front derailleur is definitely a bit clunky though.It is worth looking at the brakes on the cheap bike, as even an e bike needs brakes, and in my experience brakes are a target for cost cutting on cheap bikes. The unbranded rim brakes on my (Trek) second bike are useless, compared to my Ultegras.
Fatcontro11er wrote:
Thanks Griff500
I have a cycle to work scheme that i have used before and will be using to fund the biggest portion of the cost this might limit me in my options a little?
Not really, unless your employer applies some restriction. Most bike shops support cycle to work, and it makes no difference if it is last years model or next, as long as it is a new bike.BehindTheBikesheds wrote:
SigmaSport, most reliable company in terms of bike computers IMO, always accurate and reliable they;ve been doing it for 30+ years.
Here’s a decent one for less than £25 https://www.ebay.co.uk/itm/Wired-Bike-Computer-SIGMA-BC-16-16-NFC-Android-Premium-Line-Waterproof-IPX8-UK/183859647837?hash=item2acee3955d:g:830AAOSwd8hdEN7v
….. And another one that wont talk to the OP’s existing cadence (ridesense) and hrm sensors. Keep up at the back!August starts next week, and
August starts next week, and we are into the silly season. 2019 facelifts are being announced, and dealers will start offloading “old” stock. Its a buyers market. By September you should expect discounts of up to 30% if you’re happy to accept a 2019 colour scheme instead of 2020. Shop around, have fun, bargain hard.
Simon E wrote:
You didn’t say what features you do need from a computer.
Do you need GPS? If you don’t then I’d look at Cateye Strada or similar.
The OP does mention he has ridesense and an hrm. I don’t believe the Cateye does hrm or cadence (which the ridesense outputs). Apart from that, 40 quid and a 1 year battery life is very tempting if you only want speed and distance.Wafty Crank wrote:
Price wise, I got the Mega for around £100 so still a fair bit cheaper than a Bolt.
I say again. Today’s price Mega Xl £152. Bolt £189. (Wiggle prices)There is no longer clear blue
There is no longer clear blue water between the price of so called budget and premium models. Another user on here has recommended Lezyne, and then gone on to point out that their software and app are poor. The Bolt is noted by users for “just doing it”. Easy to set up, versatile, good compatibility with other devices and apps. Mega £152. Bolt £189.
