Search found 35551 matches

by Brucey
20 Oct 2019, 8:35pm
Forum: Bikes & Bits – Technical section
Topic: Bb30 installation to grease or not?
Replies: 5
Views: 191

Re: Bb30 installation to grease or not?

one wave washer is sufficient.

cheers
by Brucey
20 Oct 2019, 6:17pm
Forum: Bikes & Bits – Technical section
Topic: Removing a stuck chainring bolt
Replies: 58
Views: 1283

Re: Removing a stuck chainring bolt

I'll carry on regardless and recommend that people grease their chainring bolts as I have always done. . except that you are not recommending that you grease the bolts, you are recommending that you grease the interfaces that the chainring sit on as well. Greasing bolts is something that is widely ...
by Brucey
20 Oct 2019, 6:02pm
Forum: Bikes & Bits – Technical section
Topic: Removing a stuck chainring bolt
Replies: 58
Views: 1283

Re: Removing a stuck chainring bolt

The bolts get dirty... but does the grease (that shouldn't be there) between the chainrings and the spider turn black? No, never. in which case your conditions of use are different from mine (and a lot of other people's) The grease SHOULD be there in my experience. Any grease is fine... Please try ...
by Brucey
20 Oct 2019, 5:57pm
Forum: Bikes & Bits – Technical section
Topic: Removing a stuck chainring bolt
Replies: 58
Views: 1283

Re: Removing a stuck chainring bolt

Re greasing tapers; the clue is when you take apart a crankset where the cranks have been in situ, not moving around or coming off, despite being given merry hell for ages. What you will usually find is that there has been aluminium transferred from the crank to a square taper spindle, and that the ...
by Brucey
20 Oct 2019, 4:52pm
Forum: Bikes & Bits – Technical section
Topic: Removing a stuck chainring bolt
Replies: 58
Views: 1283

Re: Removing a stuck chainring bolt

The bolts get dirty... but does the grease (that shouldn't be there) between the chainrings and the spider turn black? A long time ago I experimented with this and my grease turned as black as hades after a few (fair weather) rides; compelling evidence that the parts were on the move. When they mov...
by Brucey
20 Oct 2019, 4:22pm
Forum: Bikes & Bits – Technical section
Topic: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?
Replies: 16
Views: 608

Re: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?

offset pulleys, slant parallelograms and twin-sprung designs all add capacity (although they are certainly not the only things which can do so) whilst preserving some quality in the shifting. Of these the twin sprung feature adds a little more capacity to some designs, but not that much; enough to v...
by Brucey
20 Oct 2019, 3:56pm
Forum: Bikes & Bits – Technical section
Topic: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?
Replies: 16
Views: 608

Re: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?

lol, so Shimano were being innovative adding it... Nope. It certainly wasn't shimano's idea; Simplex were doing it in about 1960, and (although they had a patent of some kind) they may not have been the first. What shimano did do is they were the first to combine the slant paralellogram (for many y...
by Brucey
20 Oct 2019, 3:39pm
Forum: Bikes & Bits – Technical section
Topic: How do I tighten this bottom bracket?
Replies: 9
Views: 259

Re: How do I tighten this bottom bracket?

I suspect that it's an oriental imitation of an external BB, of unknown quality - but how do I tighten the chainwheehl on the axle, and the bearings?? A. you don't. You file it under B for 'Bin' and buy something decent instead. I've not seen one exactly like that before but it looks pretty horribl...
by Brucey
20 Oct 2019, 12:34pm
Forum: Does anyone know … ?
Topic: Bikes and air pockets (General not technical)
Replies: 3
Views: 354

Re: Bikes and air pockets (General not technical)

https://www.donbur.co.uk/gb-en/images/uploads/standard-windtunnel.jpg get the aerodynamics right and you can be pushed along at great speed whilst following another vehicle. It takes planning, effort and sheer guts to ride a bicycle that fast, and perhaps set a record, but it isn't necessarily a fe...
by Brucey
20 Oct 2019, 11:27am
Forum: Bikes & Bits – Technical section
Topic: Small wheel blowouts - options?
Replies: 96
Views: 2028

Re: Small wheel blowouts - options?

if the contention is that 'black rims radiate heat faster than silver rims' (or similar) then it is easy enough to test this, provided you have two rims that are otherwise similar (both shape and weight) apart from the colour. Just heat the pair of them up (to ~100C) (eg inside an insulated enclosur...
by Brucey
20 Oct 2019, 11:20am
Forum: Bikes & Bits – Technical section
Topic: Removing a stuck chainring bolt
Replies: 58
Views: 1283

Re: Removing a stuck chainring bolt

.....But when you get a creaky chainring ........ .......... if you get a creaky chainring. I've never had one. does the grease (that shouldn't be there IMHO) in the interface between the chainrings and spider change colour so that it comes out black and horrible after a few thousand miles? If it d...
by Brucey
20 Oct 2019, 11:09am
Forum: Bikes & Bits – Technical section
Topic: Bb30 installation to grease or not?
Replies: 5
Views: 191

Re: Bb30 installation to grease or not?

it all depends on the fit of the bearings on the BB spindle. If the fit is snug/tight then it doesn't matter what you do really. However if the fit is a bit slack then you are better off using a bearing fitting compound, else things can go wrong. IME the usual problem with BB30 is the way the bearin...
by Brucey
20 Oct 2019, 11:02am
Forum: Bikes & Bits – Technical section
Topic: Removing a stuck chainring bolt
Replies: 58
Views: 1283

Re: Removing a stuck chainring bolt

Go for a ride mick :) On a related point, while brucey is here, is there a recommended way to tighten the bolts? Am I right in assuming that you work on opposing pairs (or pairsish with 5 bolt spiders) , tightening gradually , to keep everything balanced? what you describe is like the usual method ...
by Brucey
20 Oct 2019, 10:15am
Forum: Does anyone know … ?
Topic: Dropped seat stays - good bad or ugly?!
Replies: 3
Views: 240

Re: Dropped seat stays - good bad or ugly?!

done well, in carbon, it can increase the frame's movement when you go over bumps.

Done as well as it is usually done, in other materials, it can promote premature failure of the frame. I've seen quite a few break there.

cheers
by Brucey
19 Oct 2019, 11:37pm
Forum: Bikes & Bits – Technical section
Topic: Removing a stuck chainring bolt
Replies: 58
Views: 1283

Re: Removing a stuck chainring bolt

if it works for you it works for you. But when you get a creaky chainring the most reliable fix is to clean the interfaces completely, then clean the bolt threads, regrease them and retorque the bolts. In many rider's use if a bolt comes loose (say) and chain lube has been in the interface, it'll ca...