Search found 3478 matches

by squeaker
6 Feb 2019, 3:50pm
Forum: Bikes & Bits – Technical section
Topic: Suspension power losses/savings
Replies: 36
Views: 2527

Re: Suspension power losses/savings

Our bodies bounce badly by comparison and that is the source of Heine’s suspension losses. But how does he measure these internal losses? IIRC he inferred them by coasting downhill over rumble strips and observing the speed change vs riding on the smoother surface alongside. US-style rumble strips ...
by squeaker
6 Feb 2019, 12:45pm
Forum: Bikes & Bits – Technical section
Topic: Suspension power losses/savings
Replies: 36
Views: 2527

Re: Suspension power losses/savings

Samuel D wrote:Our bodies bounce badly by comparison and that is the source of Heine’s suspension losses.
But how does he measure these internal losses?
by squeaker
6 Feb 2019, 10:29am
Forum: Bikes & Bits – Technical section
Topic: Suspension power losses/savings
Replies: 36
Views: 2527

Re: Suspension power losses/savings

Given that the losses are in the tyres, it has to be a pretty special suspension that reduces tyre losses on relatively high frequency surface roughness eg with cyclic repetition within the tyre footprint length Which losses are you referring to here? The major energy losses in riding a bicycle on ...
by squeaker
5 Feb 2019, 9:24pm
Forum: Bikes & Bits – Technical section
Topic: Suspension power losses/savings
Replies: 36
Views: 2527

Re: Suspension power losses/savings

...We could also reduce vibration by fitting a suspension fork. ... Only for a minority of cases, IME. Given that the losses are in the tyres, it has to be a pretty special suspension that reduces tyre losses on relatively high frequency surface roughness eg with cyclic repetition within the tyre f...
by squeaker
5 Feb 2019, 8:45pm
Forum: Bikes & Bits – Technical section
Topic: Suspension power losses/savings
Replies: 36
Views: 2527

Re: Suspension power losses/savings

...We could also reduce vibration by fitting a suspension fork. ... Only for a minority of cases, IME. Given that the losses are in the tyres, it has to be a pretty special suspension that reduces tyre losses on relatively high frequency surface roughness eg with cyclic repetition within the tyre f...
by squeaker
4 Feb 2019, 10:16am
Forum: Cycling UK Topics and Discussions
Topic: New look Cycling UK clothing ... coming soon.
Replies: 35
Views: 7187

Re: New look Cycling UK clothing ... coming soon.

gaz wrote:I wonder if there will be a new heritage range?
:lol: :lol: :lol:
Sad to see Cycling UK going down the football kit path :(
by squeaker
4 Feb 2019, 10:00am
Forum: Non-standard, Human Powered Vehicles
Topic: 1x11 gearing on a bent
Replies: 46
Views: 10099

Re: 1x11 gearing on a bent

UpWrong wrote:Zach Kaplan's comments on the MD here are that it resulted in a lot of boom flex,
http://www.bentrideronline.com/messageboard/showthread.php?t=144548
Oooh, nice link. Worth looking at the onward FB link for the pix. (I'd never heard of Mitas tyres either!)
by squeaker
30 Jan 2019, 6:27pm
Forum: Campaigning & Public Policy
Topic: Every breath we take: the lifelong impact of air pollution
Replies: 584
Views: 72056

Re: Every breath we take: the lifelong impact of air pollution

https://www.youtube.com/watch?v=gguwJRrzzF8 Having watched to half way through I get the impression that the film makers are presenting the diesel bans in German cities as unreasonable panic due to reliance on incomplete science. Having watched the lot I'd go along with the 'unreasonable panic' the...
by squeaker
30 Jan 2019, 11:12am
Forum: Bikes & Bits – Technical section
Topic: Front lights again
Replies: 43
Views: 4633

Re: Front lights again

Bmblbzzz wrote:Alignment to avoid dazzle: All lights need proper set up to avoid dazzling other people! This definitely includes those which comply with Stvzo.
Indeed: especially the guy I saw a while back with 2 StVZO Lidl lights clamped on his bike's front fork legs (ie rotated through 90 degrees) :shock:
by squeaker
30 Jan 2019, 10:56am
Forum: Does anyone know … ?
Topic: Cycle Stands
Replies: 18
Views: 2397

Re: Cycle Stands

MikeF wrote:Is there an advantage with this type of stand being installed in Birmingham?
Well they are definitely better than these proposed for central Worthing (to replace an existing group of heavily used Sheffield stands) :roll:
cyclestands.jpg
by squeaker
28 Jan 2019, 6:49pm
Forum: Non-standard, Human Powered Vehicles
Topic: 1x11 gearing on a bent
Replies: 46
Views: 10099

Re: 1x11 gearing on a bent

I can’t detect any significant drag from the IGH, unlike my earlier experience of a Schlumpf Mountain Drive which was like pedalling with rubber cranks :roll: Interesting (but going OT). I recently fitted a Schlumpf MD to my WAW velomobile (52T chainring so 21T equivalent when engaged) and that fee...
by squeaker
27 Jan 2019, 10:51am
Forum: The Tea Shop
Topic: Duke In Rollover
Replies: 427
Views: 13205

Re: Duke In Rollover

brynpoeth wrote:The Guardian reports that the Prince apologised
He'll probably get a slap on the wrist from his insurance company now :roll:
by squeaker
26 Jan 2019, 11:31am
Forum: The Tea Shop
Topic: Computers
Replies: 26
Views: 1281

Re: Computers

Tangled Metal wrote:I'm hoping someone has good advice on buying a new laptop.
Asus for reliability. Morgan for good prices.
That's my starting point: yours may differ :wink:
by squeaker
20 Jan 2019, 6:19pm
Forum: Bikes & Bits – Technical section
Topic: Replacing BB30 bottom bracket
Replies: 10
Views: 589

Re: Replacing BB30 bottom bracket

IME holding the tool in place as shown here (scroll down) can save a lot of grief if the metal / plastic rings are tight. (If the crank spindle is solid then a crank retaining bolt will usually work with a few washers.)
HTH
by squeaker
20 Jan 2019, 11:28am
Forum: Non-standard, Human Powered Vehicles
Topic: 1x11 gearing on a bent
Replies: 46
Views: 10099

Re: 1x11 gearing on a bent

UpWrong wrote:Anybody done this?
'Vangelo' on BROL has produced a range of tasty FWD Performers with 1 x 11 (IIRC).
HTH