Search found 106 matches

by StephenW
11 Oct 2018, 5:36pm
Forum: Bikes & Bits – Technical section
Topic: Crack in aluminium recumbent frame
Replies: 9
Views: 528

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: 528

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: 3926

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: 528

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: 13677

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: 841

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: 995

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 ...
by StephenW
13 Sep 2018, 10:33pm
Forum: Bikes & Bits – Technical section
Topic: Advantage of flexible forks
Replies: 11
Views: 841

Re: Advantage of flexible forks

I know that there are arguments over durability, but leaving that to one side for the moment, is there any consensus over whether steel or carbon forks are more comfortable? I mean, I'm sure there are very stiff and very comfortable forks in both materials, but among forks which you can actually buy...
by StephenW
13 Sep 2018, 10:14pm
Forum: Bikes & Bits – Technical section
Topic: Permanent battery lights
Replies: 9
Views: 507

Re: Permanent battery lights

I have this one: https://hollandbikeshop.com/en-gb/bicycle-lights/union-bicycle-lights/union-headlight-battery/union-headlight-classic/union-headlight-un-4915-retro-led-on-batteries-black/ It's OK. I did find that it was randomly getting flat batteries, but I realised that the problem was caused by ...
by StephenW
13 Sep 2018, 9:50pm
Forum: Bikes & Bits – Technical section
Topic: reasonable minimum maintenance - winter commuter
Replies: 23
Views: 995

Re: reasonable minimum maintenance - winter commuter

How about fitting a chain case? Since I got one a couple of years ago, I have not needed to do anything to the chain. I use my bike almost every day.
by StephenW
10 Sep 2018, 9:19pm
Forum: Bikes & Bits – Technical section
Topic: Advantage of flexible forks
Replies: 11
Views: 841

Advantage of flexible forks

What is the main advantage of flexible (e.g. steel) forks? Is it: 1. To take the edge off bigger bumps? 2. To reduce vibration? Is it possible to come up with a rule of thumb for how fork stiffness and tyre size add up? E.g. a stiff fork with a 38 mm tyre feels similar to a flexible fork with a 28 m...
by StephenW
10 Sep 2018, 8:21pm
Forum: Bikes & Bits – Technical section
Topic: Chris Juden's talk at the 2017 York Rally
Replies: 88
Views: 4150

Re: Chris Juden's talk at the 2017 York Rally

If I search for "touren fahrrad" ... Unfortunately this is not good German. Different types of bike are mostly referred to as "___rad", e.g. Rennrad (racing bike), Hollandrad (Dutch bike), Liegerad (recumbent) etc. "Eine Radtour" simply means a bike ride. It does not n...
by StephenW
9 Sep 2018, 10:30pm
Forum: Non-standard, Human Powered Vehicles
Topic: Is it worth having a flexible steel fork on a recumbent?
Replies: 1
Views: 847

Re: Is it worth having a flexible steel fork on a recumbent?

I'm thinking about this fork: https://www.sjscycles.co.uk/forks/26-inch-thorn-raven-sport-tour-steel-fork-black-52-mm-offset-b-grade47433/ Does anyone know anything about these forks in general? Is it springy like a brick, or springy like a spaniel? Hopefully the backwards-mounted v-brakes will clea...
by StephenW
4 Sep 2018, 10:52pm
Forum: Campaigning & Public Policy
Topic: Electric car charging to kill off segregated cycle lanes
Replies: 66
Views: 2620

Re: Electric car charging to kill off segregated cycle lanes

I had not realised the Crossrail tunnels are as wide as that. OK, let's suppose that if they were dedicated to bikes, they could transport 28000 people per hour, per direction. The crossrail trains are designed to carry 1500 people each. If they go for 24 trains per hour (in each direction) that wou...