Search found 105 matches

by StephenW
25 Jan 2019, 5:53pm
Forum: Non-standard, Human Powered Vehicles
Topic: 1x11 gearing on a bent
Replies: 35
Views: 3052

Re: 1x11 gearing on a bent

David Gardiner of Laid Back Bikes is trying a 1*12 setup on his demo Nazca Fuego. You could ask him how it is going. I've mentioned this before, but I think it is nice to avoid really small chainrings, as they seem to give a spongy feel to the drivetrain. I think this is mostly due to frame flex, bu...
by StephenW
25 Jan 2019, 5:46pm
Forum: Bikes & Bits – Technical section
Topic: Wheel sizes vs Handling
Replies: 54
Views: 2692

Re: Wheel sizes vs Handling

Hello all There is a tool called JBike6, which allows the stability of bicycles to be analysed. There are several simplifications, such as no friction in headset or tyres, infinitely narrow tyres etc. Nevertheless, if you only want to compare one result from the program to another, I think that is O...
by StephenW
25 Jan 2019, 5:17pm
Forum: Bikes & Bits – Technical section
Topic: Wheel sizes vs Handling
Replies: 54
Views: 2692

Re: Wheel sizes vs Handling

Hello Pete One of the odder handling differences I've come across is changing the bars on an overseat steering 'bent from aero to tiller style. In either case the bike's geometry is fundamentally the same, and with no weight on the bars and seating position pretty much the same (arms excepted) there...
by StephenW
21 Dec 2018, 2:46pm
Forum: Bikes & Bits – Technical section
Topic: Plus Ca Change...
Replies: 95
Views: 3239

Re: Plus Ca Change...

... for one particular niche of the sport. To some people cycling is a sport, to others it is primarily a mode of transport. I suspect this is part of the reason behind the disagreement. You can argue on the head of a pin (and many do) about the usefulness of such developments, but you can't easily...
by StephenW
21 Dec 2018, 2:30pm
Forum: Bikes & Bits – Technical section
Topic: Plus Ca Change...
Replies: 95
Views: 3239

Re: Plus Ca Change...

Marketing and lifestyle images have always been with us. ... Which helps no one I think that grumpy skepticism serves a very useful purpose! There are a whole host of marketing departments out there trying to convince people to buy their new stuff. This needs to be counterbalanced by an army of bea...
by StephenW
19 Dec 2018, 11:00pm
Forum: Bikes & Bits – Technical section
Topic: Why you need aero wheels
Replies: 91
Views: 3697

Re: Why you need aero wheels

I'm very pleased that this discussion has digressed into recumbents! :) I'm pretty sure the difference in aerodynamic drag between a typical racing bike and a sporty recumbent (with the seat reclined a long way back) is an awful lot more than the difference that even the best wheels can make! Also, ...
by StephenW
5 Nov 2018, 10:33pm
Forum: Bikes & Bits – Technical section
Topic: The catch-all bicycle geometry thread
Replies: 9
Views: 701

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: 1097

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: 5714

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: 3906

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: 2448

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: 3906

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: 3906

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: 520

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: 520

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...