Search found 2850 matches

by Samuel D
2 Oct 2019, 9:23pm
Forum: Bikes & Bits – Technical section
Topic: Spa Audax crash damage – fork?
Replies: 53
Views: 1651

Re: Spa Audax crash damage – fork?

Some phone photos of other damage: https://imagizer.imageshack.com/img922/3888/GdpYh3.jpg A mysterious cut that caused the flat rear tyre. Of course it had to be the most expensive tyre I have, a Specialized Turbo Cotton: https://imagizer.imageshack.com/img922/5152/T2DIvv.jpg Not even the front skew...
by Samuel D
2 Oct 2019, 9:09pm
Forum: Bikes & Bits – Technical section
Topic: Spa Audax crash damage – fork?
Replies: 53
Views: 1651

Re: Spa Audax crash damage – fork?

Given the damage to the front wheel there is no reason to feel confident in the old fork. I wouldn't touch it with a barge pole now. Even if, when I take everything apart to check, there’s no visible damage? Because even if get a new fork, I’ll have to consider what to do with this one. This one is...
by Samuel D
2 Oct 2019, 9:05pm
Forum: Bikes & Bits – Technical section
Topic: Spa Audax crash damage – fork?
Replies: 53
Views: 1651

Re: Spa Audax crash damage – fork?

FWIW, I've run one of the above on my Ti Audax with no ill effect despite the longer A-C height, I was running a 55mm offset version as I wanted to try the bike with a bit less trail. Thanks very much for your detailed list of candidates, amediasatex. Regarding the above, what were your conclusions...
by Samuel D
2 Oct 2019, 9:03pm
Forum: Bikes & Bits – Technical section
Topic: Spa Audax crash damage – fork?
Replies: 53
Views: 1651

Re: Spa Audax crash damage – fork?

a new fork does sound prudent. Goodness knows where you would get one from though, a brake drop of ~52mm in steel... that might be a rare thing. It’s not 52 mm drop as Shimano would call it, but that’s what Campagnolo called it long ago on page 59 of their catalogue no. 18: https://imagizer.imagesh...
by Samuel D
2 Oct 2019, 4:09pm
Forum: Bikes & Bits – Technical section
Topic: Chain, cassette, chainring- what would you do?
Replies: 21
Views: 843

Re: Chain, cassette, chainring- what would you do?

A new chain always makes for a rough drivetrain on my bicycle. But that soon resolves itself: whether because the chain elongates slightly or the chainrings wear in the right way, I don’t know. Give it a few hours and things may improve greatly.
by Samuel D
2 Oct 2019, 4:05pm
Forum: Bikes & Bits – Technical section
Topic: Spa Audax crash damage – fork?
Replies: 53
Views: 1651

Spa Audax crash damage – fork?

Following an accident I’m getting around to the idea of fixing my bicycle. The known damage is front rim, rear tyre, right brake lever, saddle, outer chainring, handlebar tape, and a bent derailleur hanger (should bend back okay). There’s also a well-placed gouge that manages to bridge stem, spacer,...
by Samuel D
29 Sep 2019, 11:12pm
Forum: Racing, Olympics, TdF, Competitive cycling
Topic: Road Worlds
Replies: 65
Views: 1617

Re: Road Worlds

How so deliberate? Helicopters couldn’t get under the low cloud without the risk of running into terrain. They were therefore useless for most of the afternoon. The motorcycles relay their high-bitrate footage up to a loitering fixed-wing plane. The weather prevented the second of these from taking ...
by Samuel D
29 Sep 2019, 12:16pm
Forum: Bikes & Bits – Technical section
Topic: Gear adjustment screws - What screwdriver?
Replies: 130
Views: 7696

Re: Gear adjustment screws - What screwdriver?

Why, if every other fixing on a bike are "Allen bolt". Why are the derailleur adjustment screws F&R "JIS"? Surely it makes more sense to have them all the same. Shimano, at least, agrees and now makes derailleurs that use Allen keys to adjust the limit screws. See the FD-910...
by Samuel D
26 Sep 2019, 8:57pm
Forum: Touring & Expedition
Topic: La Dolce Vita
Replies: 38
Views: 2677

Re: La Dolce Vita

I think the words are perfectly understandable and well arranged. I don’t believe all of them, but enough of them ring true to make the reading good. The photos are crap and add much to the story. La vita depicted is far from dolce, although some beauty is apparent as in a William Eggleston picture....
by Samuel D
23 Sep 2019, 10:56am
Forum: Bikes & Bits – Technical section
Topic: If Rotor Uno can do it, why can't Shimano or SRAM!
Replies: 29
Views: 1121

Re: If Rotor Uno can do it, why can't Shimano or SRAM!

Campagnonlo’s choice of ratios for their two new 12-speed cassettes seems fairly sensible to me except for the 11T start, now inescapable across the industry unless you get the even sillier 10T: 11-12-13-14-15-16-17-19-21-23-26-29T 11-12-13-14-15-16-17-19-22-25-28-32T What do you make of those, Manc...
by Samuel D
23 Sep 2019, 10:08am
Forum: Bikes & Bits – Technical section
Topic: P-X EC-130E frame; what size tyres can be fitted?
Replies: 25
Views: 847

Re: P-X EC-130E frame; what size tyres can be fitted?

Many people have run 28 mm Grand Prix 4000 S II tyres on 17 mm internal width rims with Ultegra brakes. I’ve seen it done. Can you recall on what frames you've seen it? One was a 1980s Peugeot PGN 10. Two others were Specialized and Canyon carbon bicycles, but I don’t recall the models. This trend ...
by Samuel D
22 Sep 2019, 11:32pm
Forum: Bikes & Bits – Technical section
Topic: P-X EC-130E frame; what size tyres can be fitted?
Replies: 25
Views: 847

Re: P-X EC-130E frame; what size tyres can be fitted?

Many people have run 28 mm Grand Prix 4000 S II tyres on 17 mm internal width rims with Ultegra brakes. I’ve seen it done. Clearance is marginal and must cause the odd problem with mud and debris, but people are doing this. Does this frame intrude into the brake arch much in the critical areas? I’m ...
by Samuel D
22 Sep 2019, 11:17pm
Forum: Bikes & Bits – Technical section
Topic: If Rotor Uno can do it, why can't Shimano or SRAM!
Replies: 29
Views: 1121

Re: If Rotor Uno can do it, why can't Shimano or SRAM!

It depends how steep the hill is or equally, how small the inner chainring is. On a 30t inner (E.G. a Dura-Ace 7800 triple had that) I can see how those last 3 sprockets at 23-27-32 would feel like they have big gaps, but on a 22t inner they wouldn't feel like as big of a jump. I don’t follow the r...
by Samuel D
22 Sep 2019, 9:53pm
Forum: Bikes & Bits – Technical section
Topic: If Rotor Uno can do it, why can't Shimano or SRAM!
Replies: 29
Views: 1121

Re: If Rotor Uno can do it, why can't Shimano or SRAM!

Concentrating the close ratios at the high end may make sense (though this Rotor example is pretty extreme) because drag varies with the square of the speed. That means significant changes of power output cause only small differences in speed when already going fast. So you want closer ratios there ...
by Samuel D
22 Sep 2019, 9:25pm
Forum: Bikes & Bits – Technical section
Topic: The Disc Brake Naughty Corner Thread
Replies: 538
Views: 26653

Re: The Disc Brake Naughty Corner Thread

I think it’s fair to say discs get less wet than rims do. In solo riding, the front disc practically only gets wet by raindrops. Front rims appear to get wet by some other mechanism or, being larger and of greater width (on the inner surface where raindrops land before flowing to the brake track by ...