Search found 58 matches

by cromo
24 Apr 2017, 12:01pm
Forum: Bikes & Bits – Technical section
Topic: Replacement bolt for Hope seat post clamp
Replies: 14
Views: 1777

Re: Replacement bolt for Hope seat post clamp

Slipping seatposts are very annoying! I did not want to use excessive force on the seatpost clamp bolt, so I purchased a seatpost clamp and an appropriate seatpost shim and cut the shim to fit inside the extra seatclamp. The size of the shim is obviously determined by your seat post diameter and the...
by cromo
11 Apr 2017, 2:29pm
Forum: Bikes & Bits – Technical section
Topic: Easier front shifting
Replies: 21
Views: 1136

Re: Easier front shifting

In my experience top swing derailleurs have "weaker" springs than conventional swing types. They seem to take less effort to shift. Maybe you are already using top swing?
by cromo
12 Jan 2017, 12:04pm
Forum: Bikes & Bits – Technical section
Topic: Plastic washer on canti brake pivot- purpose?
Replies: 15
Views: 1378

Re: Plastic washer on canti brake pivot- purpose?

I think that until you get the brakes running smoothly and without friction then getting them balanced using the adjusting screw is probably going to be very difficult. On many bikes the cantilever boss has 3 holes for the return spring to engage, if you cannot get the brakes balanced then maybe usi...
by cromo
11 Jan 2017, 10:50pm
Forum: Bikes & Bits – Technical section
Topic: Plastic washer on canti brake pivot- purpose?
Replies: 15
Views: 1378

Re: Plastic washer on canti brake pivot- purpose?

I have not used M560 cantilevers but have used M737 cantis which I believe are very similar. The plastic shroud I always thought was basically a dust cap, They do split and are easily lost. I have not used M737 cantis for a while but I think you can remove the dust cap and then carefully lever off t...
by cromo
7 Jan 2017, 2:05pm
Forum: Bikes & Bits – Technical section
Topic: Curing A Loose Headset
Replies: 25
Views: 1794

Re: Curing A Loose Headset

I've used a similar extender and was also constantly getting "play" in the headset bearings. In my case the diameter of the extender was a bit small and it therefore wobbled inside the steerer tube. This gave the impression of slack headset bearings. If I applied the front brakes and rocke...
by cromo
12 Aug 2016, 7:48pm
Forum: Bikes & Bits – Technical section
Topic: Straightening rear derailleur
Replies: 12
Views: 1731

Re: Straightening rear derailleur

Returning to your original problem, if you want to bend the cage then I think I it might be better to remove the derailleur from the bike, remove the cage and jockey wheels and do any bending carefully "on the work bench". This avoid putting stress on other parts of the derailleur (as othe...
by cromo
12 Aug 2016, 7:43pm
Forum: Bikes & Bits – Technical section
Topic: Straightening rear derailleur
Replies: 12
Views: 1731

Re: Straightening rear derailleur

You need to check how your chain runs between the two derailleur pulleys. There is a metal tab and the chain should run on the other side of it. At the moment I think the chain is catching on the metal tab.
by cromo
6 Aug 2016, 8:28am
Forum: Bikes & Bits – Technical section
Topic: V Brake centering
Replies: 9
Views: 869

Re: V Brake centering

Is it possible that the short length of brake housing that runs from the cable stop to the V brake is too long or too short? This might be introducing a "variable force" that is acting on the V brakes. I say variable because the housing does move when the brakes are applied.
by cromo
28 Jul 2016, 7:09am
Forum: Bikes & Bits – Technical section
Topic: Slipping seatpost
Replies: 58
Views: 3115

Re: Slipping seatpost

Would an alternative be a 27.2 clamp on the seatpin so it just rested on the existing clamp? Yes, it would, if you can get one. SJS cycles sell a double clamp that clamps on the frame and the seatpost. My problem was that my bike had lugs that were part of the frame that accepted a bolt, it did not...
by cromo
27 Jul 2016, 10:13pm
Forum: Bikes & Bits – Technical section
Topic: Slipping seatpost
Replies: 58
Views: 3115

Re: Slipping seatpost

I had the same problem and found it very annoying! I did not want to use excessive force on the seatpost clamp bolt. So, I purchased a seatpost clamp (30.0 mm) and a seatpost shim (27.2 to 30.0mm, as my seatpost was 27.2mm) and cut the shim to fit inside the extra seatclamp. This extra clamp was the...
by cromo
22 May 2016, 1:51pm
Forum: Bikes & Bits – Technical section
Topic: Key Spoke - Trailing - Next To Valve Hole?
Replies: 24
Views: 1408

Re: Key Spoke - Trailing - Next To Valve Hole?

I too was confused about the possible offset of the spoke holes / eyelets on a sputnik rim recently purchased. So, I put a spoke through a spoke hole attached a nipple and seated the nipple on the eyelet by pulling on the spoke. I then tried deflecting the spoke at right angles to the rim while pull...
by cromo
30 Apr 2016, 8:32am
Forum: Bikes & Bits – Technical section
Topic: SOLVED-Bar End Shifter-LH-FD-cable pull query
Replies: 10
Views: 683

Re: Bar End Shifter-LH-FD-cable pull query

I'm no expert, but is it possible that the bar end shifter is mounted incorrectly so that it is not pulling enough cable? The bar end shifter sits on a square mount and I seem to remember reading somewhere that if it is mounted 90 degrees out, then the cable pull is affected.
by cromo
2 Apr 2016, 11:55am
Forum: Bikes & Bits – Technical section
Topic: 42 cm Surly Disc Trucker STI shifters and 22-30-40
Replies: 16
Views: 939

Re: 42 cm Surly Disc Trucker STI shifters and 22-30-40

A long time ago I had bottle boss / front derailleur problems. I used a FSA headset spacer cut appropriately to act as a shim. This allowed a 34.9mm band on derailleur to be used on a 28.6mm seat tube.
by cromo
21 Jan 2016, 4:22pm
Forum: Bikes & Bits – Technical section
Topic: Rim ERD, hub dimension, spoke length confusion
Replies: 26
Views: 2112

Re: Rim ERD, hub dimension, spoke length confusion

I have just read Brucey's post above and went out to check some of the sputnik rims I had built. Wheels, all 36H, built a while ago were fine using 262mm F and 262 / 260mm R (these lengths were given to me by Spa cycles) but one rear wheel built recently showed that the spokes were just starting to ...
by cromo
21 Jan 2016, 7:51am
Forum: Bikes & Bits – Technical section
Topic: Rim ERD, hub dimension, spoke length confusion
Replies: 26
Views: 2112

Re: Rim ERD, hub dimension, spoke length confusion

I've built wheels using 26" sputnik rims with shimano small flange hubs. I used 262mm for the front and 262 / 260 for the rear, the lengths were fine. Using the DT Swiss spoke calculator or the EDD spoke calculator these lengths would correspond to an ERD of 541mm. An ERD of 537 would have you...