grumpyoldgit
Über Member
- Location
- Surrey
Now now,long words like that before bedtime.If you cant be polite,at least dont be downright insulting.
It is not a sin to earn money & pay tax,neither is it a virtue to be poor.
This bike costs £8599.99. Is it worth it?
- Thread starter Accy cyclist
- Start date
Page may contain affiliate links. Please see terms for details.
Now now,long words like that before bedtime.If you cant be polite,at least dont be downright insulting.
It is not a sin to earn money & pay tax,neither is it a virtue to be poor.
subaqua
What’s the point
- Location
- Leytonstone
that was polite. and even when i was single and earning silly amounts in the 90s i still would have baulked at paying that much for a bike. oh and not poor by a long shot.
subaqua
What’s the point
- Location
- Leytonstone
Lee_M
Guru
hmm, beginning to build up a picture of you over the last few days
its not a very nice one
e-rider
crappy member
- Location
- South West
enough now guys - time to move on!
grumpyoldgit
Über Member
- Location
- Surrey
subaqua
What’s the point
- Location
- Leytonstone
wow thats a coincidence .
sorry must tug the forelock to those with the most expensive toys.
Rob3rt
Man or Moose!
- Location
- Manchester
What are you guy's even bickering about?
Lee_M
Guru
if it makes you feel better go ahead, must help ease the pain of that chip you're carrying around
Lee_M
Guru
no idea to be honest, but happy to keep going if someone feels the need to insult others on a forum like subaqua seems to
subaqua
What’s the point
- Location
- Leytonstone
but its OK for others to insult is it??
Lee_M
Guru
GrasB
Veteran
- Location
- Nr Cambridge
Wider tyres having a lower Crr for the same outer diameter has been known for years. Wide rims make the effective width of the tyre larger & thus reduce the Crr.
With my training bike in Italy careful selection of data allows me to accurately estimate the combined front/rear thickness of my rim sidewalls from Crr data! When building wheels in forks rather than a a truing stand I can see how egg shaped the wheel was &/or I can see if the spoke tension was low/high.
I can see the difference between my old (1.9mm spoke seat) & new (3.6mm spoke seat) chinese carbon rims, the newer ones which are noticeably less prone to radial distortion give a lower Crr than the older ones, especially towards he end of their life when cracks started to develop around the spoke holes.
On my fixed bike the Crr data can tell me if I need to true the wheels up, the rims take a lot of punishment as it's harder to change lines quickly to avoid small potholes etc. I can also tell if I was riding with the old or new rim set through the Crr data, I couldn't tell when I laced the new rims onto the older hubs (which are slotted for aero spokes) & the old rims onto the new hubs from Crr data because it was identical.
You can do your own research if you want to. You need 4 things:
1) Accurate speed measurement with a data recorder that gives high resolution sampling (1s is fine, but 0.5s is better). A Garmin Edge 500 does a fine job of this
2) A descent with a known accurate distance & drop, the profile of the descent doesn't matter as long as you can freewheel or soft pedal all the way down it (This means your power output is know to be 0w)
3) A still day or your descent to be sheltered from all wind.
4) A spreadsheet to input your data into (see this post on another forum for a working spreadsheet)
You can go further than this by using a calibrated power meter & roads with accurately known ascents/descents. You can work out your aero & rolling drag to confirm roll out data. Something like aerolab in GoldenCheetah can become invaluable for work like this. The key to all of this is choosing your data sets carefully.
black'n'yellow
Guest
so in other words - you've made it up. Enough said..... 
