Search found 129 matches

by StephenW
5 Nov 2018, 10:33pm
Forum: Bikes & Bits – Technical section
Topic: The catch-all bicycle geometry thread
Replies: 9
Views: 739

Re: The catch-all bicycle geometry thread

Hello Samuel D I started listening to the podcast, although I only got through about 20 minutes. I'll listen to more of it when I have time. Have you come across JBike6? It is a program in Matlab, which calculates the stability of bicycles based on wheelbase, weight distribution, trail, wheel interi...
by StephenW
30 Oct 2018, 6:50pm
Forum: Bikes & Bits – Technical section
Topic: What is the best seat shock absorbing strategy?
Replies: 27
Views: 1135

Re: What is the best seat shock absorbing strategy?

I have a saddle called Lepper Tour. It is a mattress saddle, which means that there are springs running from front to back underneath, as well as the two springs at the back. The springs really work! I especially realise this when I ride another bike that does not have a sprung saddle. If I put my f...
by StephenW
27 Oct 2018, 2:12pm
Forum: Helmets sub-forum
Topic: "Denialism" and cycle helmets
Replies: 165
Views: 6489

Re: "Denialism" and cycle helmets

Hello all. Helmet debates usually seem to produce more heat than light, but I found this debate quite enlightening! Going back to Horizon's original post, I read the long Guardian article. Whilst it was interesting at points, I disagree with the author's main argument, and thought it was a bit daft ...
by StephenW
15 Oct 2018, 9:28pm
Forum: Bikes & Bits – Technical section
Topic: is it the end of 23mm tyres???
Replies: 127
Views: 4032

Re: is it the end of 23mm tyres???

Hello Utility Cyclist

Do you prefer a slow or a fast cadence?
by StephenW
15 Oct 2018, 9:26pm
Forum: Non-standard, Human Powered Vehicles
Topic: Selling my Nazca Gaucho.
Replies: 1
Views: 5454

Re: Selling my Nazca Gaucho.

Is this bike now sold?
by StephenW
12 Oct 2018, 10:11pm
Forum: Bikes & Bits – Technical section
Topic: is it the end of 23mm tyres???
Replies: 127
Views: 4032

Re: is it the end of 23mm tyres???

Hello Utility Cyclist

Do you prefer a slow or a fast cadence?
by StephenW
11 Oct 2018, 5:53pm
Forum: Bikes & Bits – Technical section
Topic: is it the end of 23mm tyres???
Replies: 127
Views: 4032

Re: is it the end of 23mm tyres???

one of the most comfortable bikes I own has 753 frameset and a very light wheelset. Do you think that the light wheels are important in keeping the unsprung weight down, so that the "frame suspension" can do its job? People argue back and forth about whether lightweight wheels are worthwh...
by StephenW
11 Oct 2018, 5:40pm
Forum: Bikes & Bits – Technical section
Topic: Crack in aluminium recumbent frame
Replies: 9
Views: 560

Re: Crack in aluminium recumbent frame

I wonder if the weld at the rear of the bracket will have been unusually stressed whilst the front one has been cracking?
by StephenW
11 Oct 2018, 5:36pm
Forum: Bikes & Bits – Technical section
Topic: Crack in aluminium recumbent frame
Replies: 9
Views: 560

Re: Crack in aluminium recumbent frame

the only thing that will happen is that the seat comes adrift True, although if that happens halfway down a steep hill it might not be a very jolly experience! Strangely, the top mountings of the seat are only held into the seat stays by friction. There are these aluminium "nodules" which...
by StephenW
10 Oct 2018, 7:25pm
Forum: Bikes & Bits – Technical section
Topic: Crack in aluminium recumbent frame
Replies: 9
Views: 560

Re: Crack in aluminium recumbent frame

Hello Brucey Yes, it is like in that picture from Rob's blog. Mine has four sets of holes, rather than three, which I think means that it is from a later batch than Rob's. He says: I have heard a report from LaidBack of a more recent MetaBike frame going at the mount under the seat, but that was def...
by StephenW
9 Oct 2018, 10:30pm
Forum: Bikes & Bits – Technical section
Topic: is it the end of 23mm tyres???
Replies: 127
Views: 4032

Re: is it the end of 23mm tyres???

Jumping back a few pages, I think the point about volume maybe got a bit confused. The volume of the tyre, in itself, is not important. It is merely a by-product of the width. I found a little thought-experiment helpful: Suppose you had a 23 mm tyre, and you had a metal air reservoir attached to the...
by StephenW
9 Oct 2018, 10:18pm
Forum: Bikes & Bits – Technical section
Topic: Crack in aluminium recumbent frame
Replies: 9
Views: 560

Crack in aluminium recumbent frame

Hello. I was adjusting the seat angle on my Metabike recumbent on Sunday, when I noticed a substantial crack in the seat bracket, where it is welded onto the frame. :shock: Uh oh! The crack starts on the left and extends about halfway across, along the upper edge of the weld. metabike_seatcrack.jpg ...
by StephenW
27 Sep 2018, 11:30am
Forum: Campaigning & Public Policy
Topic: A63 - Victory for common sense -?
Replies: 167
Views: 14156

Re: A63 - Victory for common sense -?

I agree with much of what David says. People have different ideas of what "common sense" is. I'm sure there are many people who would regard cycling on 70 mph dual carriageways as contrary to "common sense". (I'm not endorsing that point of view, just saying that I think it's lik...
by StephenW
24 Sep 2018, 6:24pm
Forum: Bikes & Bits – Technical section
Topic: Advantage of flexible forks
Replies: 11
Views: 880

Re: Advantage of flexible forks

Thanks for the replies! Similar tests (blind trials with three outwardly identical lightweight/heavyweight frames painted/built up identically, and internally weighted to be the same total mass) were repeated more recently using three reasonably/very experienced cyclists and completely different res...
by StephenW
15 Sep 2018, 1:15pm
Forum: Bikes & Bits – Technical section
Topic: reasonable minimum maintenance - winter commuter
Replies: 23
Views: 1034

Re: reasonable minimum maintenance - winter commuter

What chain case are you using? This one: https://www.dutchbikebits.com/chainguards/hesling-original-chaincase Mine kept filling up with sand and silt. Mine has a little hole at the bottom, so any water that does get inside can get out. There is a little bit of dirt on the inside at the bottom, but ...