Search found 12506 matches

by 531colin
16 Feb 2020, 1:13pm
Forum: Bikes & Bits – Technical section
Topic: What is Black Sludge (rim brake question)?
Replies: 36
Views: 1134

Re: What is Black Sludge (rim brake question)?

since I rebuilt my wheels with rims with ceramic brake surfaces and discovered Shimano S70C brake blocks I dont see any residue on the rims. The brake blocks dont seem to wear down very much either. no squealing and wet weather preformance not too bad after the water has been removed, before which ...
by 531colin
16 Feb 2020, 12:52pm
Forum: Bikes & Bits – Technical section
Topic: Removing Stiff Sidewall Tyres
Replies: 11
Views: 986

Re: Removing Stiff Sidewall Tyres

DT swiss website https://www.dtswiss.com/en/products/rims/road/cross-road/r-500/ seems to be using the same illustration for "500" rims, both "db" - presumably disc brake - and the other one - presumably rim brake....but maybe I'm confused. The cross-section illustration (I can o...
by 531colin
11 Feb 2020, 3:56pm
Forum: Bikes & Bits – Technical section
Topic: Front mech cable set up query
Replies: 4
Views: 386

Re: Front mech cable set up query

Front mechs. of that period had a stop for the cable outer.
Image
http://www.classiclightweights.co.uk/components/campag-front-cable.JPG
by 531colin
6 Feb 2020, 5:14pm
Forum: Health and fitness
Topic: Click from right knee
Replies: 27
Views: 705

Re: Click from right knee

I end up after a 30 mile ride with an ache in the knee. Not exactly a pain but I'm aware of it. ….. Hmmm, that's less than ideal. You could google things like patello-femoral pain syndrome/Clarke's sign/chondromalacia patella and stuff like that; .....or just do some straight leg isometric quad. ex...
by 531colin
2 Feb 2020, 5:39pm
Forum: Bikes & Bits – Technical section
Topic: Another tyre failure; caused by dirty bike?
Replies: 10
Views: 748

Re: Another tyre failure; caused by dirty bike?

Long ago I had something similar, rightly or wrongly I attributed it to salt corrosion making the rim edge like a file. Mine looked like an impression of the fabric of the tyre sidewall, it would have been a low thread count cheapie for the winter ride to work.
by 531colin
28 Jan 2020, 9:25pm
Forum: Bikes & Bits – Technical section
Topic: Spa audax mono
Replies: 16
Views: 863

Re: Spa audax mono

I don't actually own a bike with dual pivot brakes, but...... I think the brake nut should bear on the recess in the back face of the fork crown. Spa list 5 lengths of brake nut, (12 to 30mm) the biggest jump in length is only 7mm.....the hole in the middle of the steerer must be at least twice that...
by 531colin
28 Jan 2020, 10:53am
Forum: Does anyone know … ?
Topic: e-scooter commuter community
Replies: 80
Views: 1890

Re: e-scooter commuter community

mjr wrote:I think the class 3 mobility scooter definition should be liberalised to 10 mph.

ON THE PAVEMENT?
by 531colin
28 Jan 2020, 10:44am
Forum: Bikes & Bits – Technical section
Topic: Spa audax mono
Replies: 16
Views: 863

Re: Spa audax mono

Sorry, I missed this..... …….. any, advice for how to crown mount a front light and have mudguards. ….. The brakes are like all modern brakes....they have a nut recessed into the back of the fork, the nut fits an Allen key. So the mudguard fitting goes behind the brake, not at the back of the fork. ...
by 531colin
27 Jan 2020, 5:08pm
Forum: Bikes & Bits – Technical section
Topic: Carbon Wheels: worthwhile upgrade, yay or nay?
Replies: 63
Views: 1579

Re: Carbon Wheels: worthwhile upgrade, yay or nay?

……... Carbon wheels usually come with bladed spokes tightly laced which can lack elasticity and give a harsher ride over any thing other than ultra smooth tarmac conditions, ….. Do you mind if I have a little go at quantifying that? If a spoke is at a tension of 50 kilograms force or 100 Kgf, then ...
by 531colin
27 Jan 2020, 4:10pm
Forum: Bikes & Bits – Technical section
Topic: Spa audax mono
Replies: 16
Views: 863

Re: Spa audax mono

......….The photos are quite dark, but it looks like it has track ends ie horizontal with opening at rear. Maybe my PC has a good monitor; I can see a track type dropout (horizontal slot, rear opening) with double eyelets for mudguard and carrier and a grub screw in the front of the axle slot actin...
by 531colin
27 Jan 2020, 4:02pm
Forum: Bikes & Bits – Technical section
Topic: Spa audax mono
Replies: 16
Views: 863

Re: Spa audax mono

Probably a stupid question, but how is the chain tension adjusted on that machine? I would have thought moving the wheel in the drop outs would be an issue for the rear brake? And there's no mention of an eccentric BB? This is probably going to seem picky, but in the last 100 or so years I imagine ...
by 531colin
26 Jan 2020, 6:27pm
Forum: Bikes & Bits – Technical section
Topic: What is a Gravel Bike?
Replies: 280
Views: 7663

Re: What is a Gravel Bike?

PH wrote:…….. have you worked out the difference in your size between Spa's 72.5 and the commonly available 73.5?

In round numbers, for somebody of "average male height" one degree is worth about 10mm saddle fore/aft.
by 531colin
26 Jan 2020, 6:21pm
Forum: Bikes & Bits – Technical section
Topic: Spa audax mono
Replies: 16
Views: 863

Re: Spa audax mono

………. if the wheel only runs free,..... Erm….pardon? I haven't been involved with this one, but I have seen it. I think the rear hub is this one https://spacycles.co.uk/m2b0s171p1132/FORMULA-Track-Hub-rear judging by the slotted cut-outs in the flange....therefore its a flip-flop fixed/free hub....d...
by 531colin
25 Jan 2020, 7:01pm
Forum: Does anyone know … ?
Topic: Titanium seatpost
Replies: 22
Views: 1038

Re: Titanium seatpost

Are there any noticeable practical benefits from fitting a titanium seatpost to a titanium bike? Apart from a minsculely lighter bike and a considerably lighter wallet would I notice any practical difference? Or put another way is the titanium seatpost upgrade on a Spa Elan worth going for? Get a t...
by 531colin
18 Jan 2020, 6:28pm
Forum: Bikes & Bits – Technical section
Topic: What is a Gravel Bike?
Replies: 280
Views: 7663

Re: What is a Gravel Bike?

A short wheelbase will give a choppier ride on uneven surfaces than a long wheelbase.
On the other hand, a bike with (say) 40mm tyres will be more comfortable than a bike with 28mm tyres. I can't think of a reason to limit a touring bike to 28mm tyres, but some have been designed like that.