Search found 33479 matches

by Brucey
18 May 2019, 7:24pm
Forum: Bikes & Bits – Technical section
Topic: My new (old) bike - Miyata 1000 - Recomendations needed
Replies: 17
Views: 482

Re: My new (old) bike - Miyata 1000 - Recomendations needed

looking at your photos some more I have a few more comments 1) you need new lever hoods; one of them is badly split 2) those look like 40h wheels to me. When the rims wear out don't expect them to be easy to replace. 3) the brakes look like the XT ones rather than the more commonplace BR-AT50 versio...
by Brucey
18 May 2019, 6:55pm
Forum: Bikes & Bits – Technical section
Topic: Reverse-wearing a cassette...?
Replies: 42
Views: 3039

Re: Reverse-wearing a cassette...?

with old UG sprockets you could turn them and run them in the other direction; this way every sprocket could have two lives. But not only does the HG spline prevent you from doing this, but the sprockets do too; the teeth are directional, and the ramps and gates in the sprockets are too.

cheers
by Brucey
18 May 2019, 4:39pm
Forum: Bikes & Bits – Technical section
Topic: My new (old) bike - Miyata 1000 - Recomendations needed
Replies: 17
Views: 482

Re: My new (old) bike - Miyata 1000 - Recomendations needed

the brake blocks you have look like fibrax ones; changing to kool stop would be a waste of time IMHO. Any post-mount brake block will fit. I'd choose to ditch the biopace chainrings and (as soon as work was required) I'd change to a cassette hub at the rear. First generation Deore XT 'deerhead' mech...
by Brucey
18 May 2019, 4:32pm
Forum: Bikes & Bits – Technical section
Topic: SRAM Powerlink
Replies: 10
Views: 465

Re: SRAM Powerlink

after many years not using QLs shimano have changed; some cheap shimano chains and some expensive shimano chains now use QLs. SRAM QLs work in lots of other chains but not all. KMC QLs also work in lots of other chains and they say which ones they fit, and make special QLs for some other manufacture...
by Brucey
18 May 2019, 4:28pm
Forum: Bikes & Bits – Technical section
Topic: No stopping power on my disc brakes
Replies: 40
Views: 1675

Re: No stopping power on my disc brakes

I have about dozen failed shimano calipers (from other people's bikes) in my parts stash; they all failed the same way which is the piston seals started to leak because of corrosion in the caliper body. By contrast I don't think I have ever seen more than one or two Avid BB series calipers that were...
by Brucey
18 May 2019, 11:33am
Forum: Bikes & Bits – Technical section
Topic: pulley wear; is this a record?
Replies: 17
Views: 886

Re: pulley wear; is this a record?

BITD some RDs came with circular pulleys, i.e. ones with no detectable teeth at all. Some old campag mechs had (steel) pulleys with many small bumps on them; https://cdn.shopify.com/s/files/1/0105/7312/products/RM288_VTG_Campagnolo_Gran_Sport_Vintage_Rear_Derailleur.jpg?v=1501679556 presumably so th...
by Brucey
18 May 2019, 1:50am
Forum: Bikes & Bits – Technical section
Topic: SRAM Powerlink
Replies: 10
Views: 465

Re: SRAM Powerlink

this page https://www.sram.com/sram/mountain/component/accessories suggests that currently, 8s and 9s are Powerlink (reusable) and 10s and 11s are powerlock (non reusable) This page https://www.sjscycles.co.uk/chains-spares/?brand=sram contains some anomalies but suggests that both types exist for s...
by Brucey
18 May 2019, 1:26am
Forum: Bikes & Bits – Technical section
Topic: Reverse-wearing a cassette...?
Replies: 42
Views: 3039

Re: Reverse-wearing a cassette...?

timing chains are also only ever used on chainrings of a reasonable size; this not only lowers chordal losses but it means the chain links articulate through a much smaller angle, and thus would be expected to wear more slowly.

cheers
by Brucey
17 May 2019, 9:39pm
Forum: Bikes & Bits – Technical section
Topic: Reverse-wearing a cassette...?
Replies: 42
Views: 3039

Re: Reverse-wearing a cassette...?

It interests me that some velomobile riders report much longer drivetrain life than average[*] With modern materials and manufacturing methods, surely it’s possible to design a derailleur compatible chaincase for some types of bike? [*]velomobile designs differ in the amount of protection they give...
by Brucey
17 May 2019, 6:28pm
Forum: Bikes & Bits – Technical section
Topic: Front derailleur position query
Replies: 6
Views: 315

Re: Front derailleur position query

with a triple chainset the critical clearance is usually the clearance between the middle ring and the inner cage plate.

cheers
by Brucey
17 May 2019, 6:25pm
Forum: Bikes & Bits – Technical section
Topic: pulley wear; is this a record?
Replies: 17
Views: 886

Re: pulley wear; is this a record?

and this is despite some 'maintenance'; in the photo above the inner cage plate is on upside down....

cheers
by Brucey
17 May 2019, 11:25am
Forum: Bikes & Bits – Technical section
Topic: pulley wear; is this a record?
Replies: 17
Views: 886

Re: pulley wear; is this a record?

Was there anything left of the bushings on which the pulleys spin? oddly enough, yes there was. They were worn but not that badly; they weren't free running but they still turned well enough that the pulleys weren't rounded off entirely. This mech used a standard (metal on plastic bushing) lower pu...
by Brucey
17 May 2019, 11:14am
Forum: Bikes & Bits – Technical section
Topic: Replacing Avid Shorty Ultimate brake pads
Replies: 2
Views: 163

Re: Replacing Avid Shorty Ultimate brake pads

the holders look like they accept standard (shimano pattern) road inserts. There are gazillions of other holders for these inserts which also allow some articulation. You can fit longer M5 threaded screws and spacers as required to most holders. Most road holders have a small M4 threaded retaining s...
by Brucey
17 May 2019, 10:29am
Forum: Bikes & Bits – Technical section
Topic: SRAM Apex 1 not downshifting
Replies: 8
Views: 1456

Re: SRAM Apex 1 not downshifting

if the shifting is bad or the shifting has gone bad immediately after cleaning the bike, the cabling is the first suspect.

FWIW shimano used to have a document called something like "101 causes of bad shifting" on their website; there are many things that can go wrong.

cheers
by Brucey
17 May 2019, 9:11am
Forum: Bikes & Bits – Technical section
Topic: Reverse-wearing a cassette...?
Replies: 42
Views: 3039

Re: Reverse-wearing a cassette...?

Thanks Brucey that's so helpful. Does anyone make a tool to peen chain pins over? yes, several types are out there but NB the peening is a) carried out on a special pin not a standard one from the chain and b) the special pin is a different size from a standard one; remember that part of the proble...