Search found 2203 matches

by Samuel D
17 Jul 2018, 10:32am
Forum: Bikes & Bits – Technical section
Topic: Ultegra hub re-lace / wheel build opinions
Replies: 5
Views: 113

Re: Ultegra hub re-lace / wheel build opinions

I suspect it will be fine as a cross-three build. However, I’ve never been certain how to ensure the spokes sit in the flange indents that the first cross-three build produced. Guesswork has eventually worked for me but there must be a neat counting method to getting this right the first time. Jobst...
by Samuel D
16 Jul 2018, 7:09pm
Forum: Cycling Goods & Services - Your Reviews
Topic: Spa Cycles (Harrogate)
Replies: 500
Views: 308278

Re: Spa Cycles (Harrogate)

If I understand correctly, you’ve had this bicycle for many years and are now expecting a new bicycle because you don’t like SRAM Apex gears? Plus the sand, of course. I think that ship has sailed, mister!
by Samuel D
16 Jul 2018, 8:54am
Forum: Bikes & Bits – Technical section
Topic: Now where's the logic in this? Chain thoughts
Replies: 14
Views: 524

Re: Now where's the logic in this? Chain thoughts

Was the noisy chain a SRAM and the other something else? SRAM chains seem to have looser rollers than most. I really ought to measure these things sometime.
by Samuel D
12 Jul 2018, 9:36am
Forum: Bikes & Bits – Technical section
Topic: Roller Pinion + Shaft Drive
Replies: 24
Views: 897

Re: Roller Pinion + Shaft Drive

YouTube video here . There’s visible backlash at 1:37 (more easily seen at 0.25x playback speed; link starts five seconds before the backlash). Rack and pinion machines are often preloaded to avoid backlash, but doing that here would eliminate the possibility of shifting with the scheme they envisa...
by Samuel D
10 Jul 2018, 11:57pm
Forum: Bikes & Bits – Technical section
Topic: Rotor 1x13 hydraulic groupset
Replies: 9
Views: 379

Re: Rotor 1x13 hydraulic groupset

⋅ The compromised chainring size used in a 1x set-up demands smaller rear sprockets at cruising speeds. The result is greater power loss in the drivetrain for the majority of your ride. ⋅ Said smaller sprockets wear more quickly. ⋅ The wear problem is compounded by fre...
by Samuel D
10 Jul 2018, 3:00pm
Forum: Bikes & Bits – Technical section
Topic: Suntour ARX rear derailleur pull ratio
Replies: 12
Views: 337

Re: Suntour ARX rear derailleur pull ratio

fastpedaller wrote:The 7 speed cassette measures 32 mm

More like 30 mm, surely, since the pitch is 5 mm?
by Samuel D
3 Jul 2018, 12:48pm
Forum: Bikes & Bits – Technical section
Topic: 3-cross 32 spoke wheels, which spokes?
Replies: 48
Views: 1496

Re: 3-cross 32 spoke wheels, which spokes?

You should read Jobst Brandt’s book again. Riding doesn’t perform useful stress relief. On the contrary, it eventually breaks spokes that haven’t been stress-relieved.
by Samuel D
30 Jun 2018, 7:22pm
Forum: Bikes & Bits – Technical section
Topic: Cheap Gauge for Rim Wear Check
Replies: 27
Views: 953

Re: Cheap Gauge for Rim Wear Check

Rear discs, conversely have little use (and indeed little benefit, usually negative) and they can often suffer from rust due to little use - they are even less use than drums for a handbrake, and are (unless a very high performance car) merely a 'vanity item' They’re also a nice little money-spinne...
by Samuel D
30 Jun 2018, 4:01pm
Forum: Bikes & Bits – Technical section
Topic: chainset noise
Replies: 23
Views: 735

Re: chainset noise

I dont understand the comments about the bar end shifter as once I've shifted (and trimmed if required) the chain isn't touching the FD, how would a different shifter help? It wouldn’t if your existing trim function adequately solves the problem. Sometimes it does not, again depending on a host of ...
by Samuel D
30 Jun 2018, 11:19am
Forum: Bikes & Bits – Technical section
Topic: Titanium Relaxed Audax Bike
Replies: 4
Views: 295

Re: Titanium Relaxed Audax Bike

The Spa Audax has many things going for it, but I wouldn’t say it has a tall head tube. You’ll likely need plenty of spacers to get an upright position on this frame. But that’s okay and the forks come with a long steerer tube.
by Samuel D
30 Jun 2018, 9:45am
Forum: On the road
Topic: Using a 50x11 I need to be doing at least 40mph
Replies: 35
Views: 1555

Re: Using a 50x11 I need to be doing at least 40mph

I’ll take fewer sprockets with their attendant advantages and optimised gears over a narrower range. This is where I'll differ. As long as I can get the correct even steps between gears then my thinking is to maximize the range. That's the reason I've ended up with 24 unique gears (out of 56) with ...
by Samuel D
30 Jun 2018, 9:40am
Forum: Bikes & Bits – Technical section
Topic: chainset noise
Replies: 23
Views: 735

Re: chainset noise

If it's compact road double ie; 34/48,50,52 then larger the difference between inner and outer rings also increases the likelihood of the chain scraping the front mech in small/small gears,whereas a larger inner ring such as the old 42/52 lessened the chance. Not only does a large chainring differe...
by Samuel D
29 Jun 2018, 8:38pm
Forum: Bikes & Bits – Technical section
Topic: Cheap Gauge for Rim Wear Check
Replies: 27
Views: 953

Re: Cheap Gauge for Rim Wear Check

gxaustin wrote:My Open Pro rim collapsed at a thickness of 0.9mm.

Do you recall the particulars about the tyre width and pressure?
by Samuel D
29 Jun 2018, 8:35pm
Forum: Bikes & Bits – Technical section
Topic: chainset noise
Replies: 23
Views: 735

Re: chainset noise

I know small/small is not advisable but I should be still able to use it without it hitting the ramps shouldn't I? Not necessarily. Depending on a few things (chain stay length, chain width, chainring spacing, etc.), it’s often the case that the chain will hit those ramps. Most road bikes I’ve ridd...
by Samuel D
29 Jun 2018, 8:29pm
Forum: On the road
Topic: Using a 50x11 I need to be doing at least 40mph
Replies: 35
Views: 1555

Re: Using a 50x11 I need to be doing at least 40mph

Back before all this aero stuff and double digit gear sets I used to time trial with a 57x12 solo and 62x12 on the tandem (there were no 11 sprockets!) 57 × 12 is a much taller gear than Wiggins used to set the hour record, and he used many aerodynamic aids. I suppose he didn’t have trucks to draft...