Search found 33499 matches

by Brucey
25 May 2019, 12:33pm
Forum: Bikes & Bits – Technical section
Topic: Avid BB7 broken disc caliper
Replies: 7
Views: 332

Re: Avid BB7 broken disc caliper

Breakages of any kind in Avid BB series calipers seem pretty rare to me. This week I saw another; in a six-year old BB5 (MTB) front caliper, the main return spring broke. The fracture face was a bit corroded but the rest of the spring wasn't, suggesting that the ends of the spring corroded after the...
by Brucey
25 May 2019, 9:00am
Forum: Bikes & Bits – Technical section
Topic: Fixed gear chain wear
Replies: 35
Views: 1016

Re: Fixed gear chain wear

forget about the wear, 42/22 is a very low gear, good for going up hills only IMV. Why so low?

cheers
by Brucey
25 May 2019, 12:04am
Forum: Bikes & Bits – Technical section
Topic: Vintage Raleigh help needed please
Replies: 10
Views: 305

Re: Vintage Raleigh help needed please

I hate to sound-off like a parrot again but, are those forks pushed back? I think in this case it looks worse than it is because of lens distortion; in one of the other pictures the forks look straight(er). Anyway I have found that with these Raleigh forks, they usually bend in the upper half of th...
by Brucey
25 May 2019, 12:01am
Forum: Bikes & Bits – Technical section
Topic: Lubricants for ratchet mechanisms
Replies: 34
Views: 1185

Re: Lubricants for ratchet mechanisms

the last CG125 I owned I bought for a friend of mine who wanted a cheap bike to learn on, many years ago. Unfortunately the only machine that was within budget was about 80 miles away and had been standing, part-disassembled, for some time. Anyway off I went to collect the remains and -amazingly- bu...
by Brucey
24 May 2019, 11:11pm
Forum: Bikes & Bits – Technical section
Topic: Vintage Raleigh help needed please
Replies: 10
Views: 305

Re: Vintage Raleigh help needed please

indeed, but the 1935 model has different rear dropouts; the OP's has the later style with the low set mudguard eyelets (which ran until the 1980s in fact). It isn't very clear but the 1939 model I think also has the low set eyelets.

cheers
by Brucey
24 May 2019, 9:53pm
Forum: Bikes & Bits – Technical section
Topic: Vintage Raleigh help needed please
Replies: 10
Views: 305

Re: Vintage Raleigh help needed please

the combination of slack angles and no fittings for rod brakes makes it look most like a 1930s 'sports' model design to me. Post-war sports models had the same dropouts and mudguard eyes but steeper angles and more braze-ons; specifically on in the RH chainstay for the chaincase, and one on the seat...
by Brucey
24 May 2019, 9:34pm
Forum: Bikes & Bits – Technical section
Topic: Deep Rim/Short Spokes vs. Shallow Rim/Long Spokes
Replies: 17
Views: 556

Re: Deep Rim/Short Spokes vs. Shallow Rim/Long Spokes

light wheels and tyres nearly always feel nicer to ride on but the difference is smallest when going up a nice smooth climb and actually measuring much difference in speed is quite another thing. No one mentioned wheel cost as a factor but IMHO wheels are only one step away from tyres in that (espec...
by Brucey
24 May 2019, 4:20pm
Forum: Bikes & Bits – Technical section
Topic: Inner Tube Blow Outs
Replies: 7
Views: 321

Re: Inner Tube Blow Outs

http://bikerumor.com/wp-content/uploads/2016/08/schwalbe-ETRTO-rim-and-tire-width-recommendation-chart.gif according to etrto it is OK to use a 50mm tyre on a 17mm rim with a hook bead (crotchet type) rim. However with a non-hook bead rim a 50mm tyre is the largest that will fit a 20mm internal wid...
by Brucey
24 May 2019, 1:22pm
Forum: Bikes & Bits – Technical section
Topic: Inner Tube Blow Outs
Replies: 7
Views: 321

Re: Inner Tube Blow Outs

I agree with the above; I think it is best to use a tube that is towards the lower end of the claimed range of sizes because the manufacturers are, uh, 'somewhat optimistic' about the range of sizes that are covered. When you inflate a tube outside the tyre you can usually see that the part around t...
by Brucey
24 May 2019, 1:05pm
Forum: Bikes & Bits – Technical section
Topic: Lubricants for ratchet mechanisms
Replies: 34
Views: 1185

Re: Lubricants for ratchet mechanisms

mid to premium quality tools often/usually sell at a mid to premium price because of the brand name (and sometimes the guarantee) rather than known and proven attributes per se. Most of the big brands don't even make everything they sell; Facom sockets made in Taiwan are a case in point. When you bu...
by Brucey
24 May 2019, 11:45am
Forum: Does anyone know … ?
Topic: What value for used bike parts ?
Replies: 2
Views: 317

Re: What value for used bike parts ?

the Cyclo bottom bracket tap marking of '26-r' could mean that it is a 26 tpi tap as is required for old raleighs. If so it is something of a specialist item these days, you can't easily buy bottom brackets to this specification. Off-puttingly, someone has modified the lead-in on one end of the tap ...
by Brucey
24 May 2019, 12:29am
Forum: Bikes & Bits – Technical section
Topic: Freehub swap
Replies: 8
Views: 322

Re: Freehub swap

'no chance' is the usual answer to this kind of thing.

cheers
by Brucey
23 May 2019, 6:31pm
Forum: Bikes & Bits – Technical section
Topic: Shimano SIS outer.
Replies: 5
Views: 238

Re: Shimano SIS outer.

I've seen all sorts, including bikes which were (from new) cabled up with parallel strand reinforced outer in the gear runs except for the loop to the RD. I've mentioned this before but jagwire make stepped ferrules that allow 5.0mm housing to fit into cable stops that also have a 5.0mm diameter. Be...
by Brucey
23 May 2019, 6:26pm
Forum: Bikes & Bits – Technical section
Topic: Stronglight Bottom Bracket Cup Stuck
Replies: 10
Views: 295

Re: Stronglight Bottom Bracket Cup Stuck

apologies if this is obvious but

a) the RH cup is on a left-handed thread and
b) so is the lockring, which has to be undone first.

The (right side?) cup in the picture looks as if someone has tried to turn it ACW, which would be tightening it

cheers
by Brucey
23 May 2019, 2:31pm
Forum: Bikes & Bits – Technical section
Topic: Dented frame repair
Replies: 25
Views: 754

Re: Dented frame repair

if you fit a sturdy seat pin and massage the area with a soft-faced hammer you may be able to get it to come better than it has without damaging the paint. However 0.2mm is a very small dent; a couple of coats of filler primer, sanding down and then a sticker over the top may be a good repair. Repla...