Search found 35504 matches

by Brucey
16 Oct 2019, 7:17pm
Forum: Bikes & Bits – Technical section
Topic: Shadow MTB rear mechs Vs older design - old tucks into smaller sprockets better?
Replies: 4
Views: 134

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

shadow mechs (in theory) don't work well with such a wide range of (biggest) sprocket sizes as twin-sprung RDs. But they more than make up for this by wearing far more slowly at the top knuckle, and this means that shifting performance is better for longer. The working life of many older shimano RDs...
by Brucey
16 Oct 2019, 7:01pm
Forum: Bikes & Bits – Technical section
Topic: Paging Brucey: Alfine 8 with Jtek Thumbshifter
Replies: 3
Views: 107

Re: Paging Brucey: Alfine 8 with Jtek Thumbshifter

if gear oil leaks out too fast you can use a semi-fluid grease instead. But if you leave the factory lube alone, and water gets into the hub (which it might well do, the seals cannot work without a film of lubricant in them) then the hub is likely to be ruined pretty quickly.

cheers
by Brucey
16 Oct 2019, 3:45pm
Forum: Bikes & Bits – Technical section
Topic: Paging Brucey: Alfine 8 with Jtek Thumbshifter
Replies: 3
Views: 107

Re: Paging Brucey: Alfine 8 with Jtek Thumbshifter

the most recent alfine 8s hubs (with the cassette joint arm above the chainstay like the 11s ones) are 'high normal' and thus give the shift action you want. Older models like 500 and 501 are 'low normal' and work the reverse way. All the vaguely recent alfine 8s hubs have roller clutches throughout...
by Brucey
16 Oct 2019, 12:21pm
Forum: Bikes & Bits – Technical section
Topic: New wheels for my steel framed racer ?
Replies: 10
Views: 269

Re: New wheels for my steel framed racer ?

IIRC the rims you have are ~495g. You can get 'lighter wheels' but they will mostly be lighter in the hubs (often at the expense of durability) and spokes (fewer of them, often resulting in rather flexy wheel). If you want a wheelset that suits the bike and feels more lively, you could get wheels bu...
by Brucey
16 Oct 2019, 12:06pm
Forum: Bikes & Bits – Technical section
Topic: Bike Conversion advice sought
Replies: 7
Views: 266

Re: Bike Conversion advice sought

FWIW the main objection that folk have to using a standard 3s hub is that the gear ratios are further apart than they are used to. The main objection to using a derailleur on a hack bike is that they are a right dirt trap. However if you are stuck with a tensioner anyway (because you are re-using a ...
by Brucey
16 Oct 2019, 11:48am
Forum: Bikes & Bits – Technical section
Topic: The timeless appeal of 7-speed gearing
Replies: 183
Views: 11053

Re: The timeless appeal of 7-speed gearing

if you re-use a 'second smallest' sprocket as a 'smallest sprocket' often (but not always) you will find that there is a small counterbore in the middle of the sprocket so that a smaller (11T) sprocket with an integral spacer is strong enough to work OK. This counterbore often allows you to use a sm...
by Brucey
16 Oct 2019, 11:23am
Forum: Bikes & Bits – Technical section
Topic: Problem with 105 set up
Replies: 7
Views: 337

Re: Problem with 105 set up

IME plastic ferrules often fail if you are not suitably diligent with cable prep. I will use plastic ferrules but only if they are a snug fit and the housing that goes in them is ground square; cut ends, when examined, usually show the ends of each wire being like little chisels, just ready to gouge...
by Brucey
16 Oct 2019, 11:08am
Forum: Bikes & Bits – Technical section
Topic: Rim thickness - worn out?
Replies: 90
Views: 1902

Re: Rim thickness - worn out?

you can build a 36h rim onto a 28h hub in two different ways 1) Drill extra holes in the flange (large flanges only) 2) make 'endless' spokes , i.e. which are threaded for nipples both ends and pass through the hub flange. I've done both and both are a lot of work, using weird spoke lengths. 2) is o...
by Brucey
16 Oct 2019, 10:54am
Forum: Bikes & Bits – Technical section
Topic: Gear cable inner for Brompton.
Replies: 2
Views: 63

Re: Gear cable inner for Brompton.

IIRC a standard (but skinny ~1.0mm) cable with a standard (derailleur) nipple ought to work with a 'pre 2017' 3s shifter. If not, reducing the size of the nipple isn't a big job. I'd suggest a nipple with both ends square would be better than one with a domed end. A snag is that the pinch bolts made...
by Brucey
16 Oct 2019, 10:18am
Forum: Does anyone know … ?
Topic: Going Tubeless - What Size Tape??
Replies: 16
Views: 482

Re: Going Tubeless - What Size Tape??

my view is informed by quite a few installations using DT tape that have been just fine. I used to be fussier about it until I saw others where the tape was 1-2mm up the sides with no apparent ill effect. Maybe some other tapes cause problems?

cheers
by Brucey
16 Oct 2019, 12:48am
Forum: Bikes & Bits – Technical section
Topic: Rim thickness - worn out?
Replies: 90
Views: 1902

Re: Rim thickness - worn out?

Suggestion; why not fit a front hub brake? A bit of engineering required of course, but not too expensive, and you would then need only 36H rims in the future, and half as many of them if you are routinely wearing them out. If you bias the braking more to the front you could keep the wear off the re...
by Brucey
16 Oct 2019, 12:37am
Forum: Bikes & Bits – Technical section
Topic: Cantilever brakes
Replies: 22
Views: 792

Re: Cantilever brakes

If you use STIs (for example) then you are stuck with whatever brakes will work with your STIs. This varies with the STI model.

Just because you have not managed to break a V brake doesn't mean that it isn't easy to do or commonplace; it is both those things.

cheers
by Brucey
16 Oct 2019, 12:34am
Forum: Bikes & Bits – Technical section
Topic: Cassette question
Replies: 26
Views: 961

Re: Cassette question

…. Most people ( who aren’t just trying to be internet contrary Marys ) will get some degree of slip, if they don’t change cassettes and chains in unison. It’s not always a dead cert, but usually it’s fairly well expected. I think there are enough people happily changing chain only, early enough th...
by Brucey
16 Oct 2019, 12:20am
Forum: Bikes & Bits – Technical section
Topic: Park Chain Cyclone Cleaner
Replies: 90
Views: 3563

Re: Park Chain Cyclone Cleaner

beer with a degreaser top; there's a cocktail to conjure with.... cleans you out like nothing else.... :shock:

cheers
by Brucey
16 Oct 2019, 12:16am
Forum: Bikes & Bits – Technical section
Topic: Cantilever brakes
Replies: 22
Views: 792

Re: Cantilever brakes

Do Vs have any disadvantages compared to the best cantis? yes; as previously noted most V brakes are easily damaged (in a way that isn't always obvious) if the steering swings to one side. There is also a different range of brake levers for each brake type; this may affect your choice of brake as m...