Search found 141 matches

by lackofgrip
31 May 2014, 9:32pm
Forum: Bikes & Bits – Technical section
Topic: What BB do I need???
Replies: 7
Views: 1959

Re: What BB do I need???

recordacefromnew wrote:BTW it is not true that 113mm octalink V2's are only for triples - Shimano used them for some road doubles like the fc-3301/fc-4401, and even the new Claris I think. What is true is that for a period many Shimano mtb chainsets needed a 113mm V2 to achieve a 47.5mm chainline, and they were practically all triples.

Absent manufacturer spec and bb then as Brucey said you have to estimate what spindle length the new chainset requires. However it is not straightforward because octalinks aren't typically symmetric, iirc the longer ones are more asymmetric than the shorter ones.

First I think you should make sure it needs a V2 rather than a V1. The V2 splines are 9mm long 2.8mm wide, while V1's are 5mm and 2.2mm respectively. If you install with the wrong one it will ruin the chainset for good.

To start place the chainset with the inner face up on a table, and half cover it with a hard board, you then measure the distance between the bottom of the board and the top of the spline slots, let us call that X mm. Similarly measure the distance between the bottom of the board and mid way between the two rings, and let us call that Y mm.

If you want a chainline of 43.5mm (standard for road double), then the V2 drive side spindle needs to be (43.5 + 9 + X - Y) mm long. IF (and this is a big if as Brucey also indicated) the bb spindle is symmetric then the spindle length you need is twice that, but this is not something you should assume. If you provide the figure, we / someone should be able to tell you what the likely spindle length you need is.


Now my mind is truly frazzled :oops:
I have yet to collect the chainset from Royal Mail as a card was left but seller assures me it is V2
by lackofgrip
31 May 2014, 8:22pm
Forum: Bikes & Bits – Technical section
Topic: What BB do I need???
Replies: 7
Views: 1959

Re: What BB do I need???

I measured chainline of current chainset as shown in sheldon brown

But current chainset is FSA Gossamer with mega exo external bracket

it was 113mm?
by lackofgrip
29 May 2014, 10:24pm
Forum: Bikes & Bits – Technical section
Topic: What BB do I need???
Replies: 7
Views: 1959

Re: What BB do I need???

Could I measure the chain line with the current crank? OR does it have to be the one I'm installing? If it has to be the one I'm installing I can't measure accurately without the BB.
by lackofgrip
26 May 2014, 6:50pm
Forum: Bikes & Bits – Technical section
Topic: What BB do I need???
Replies: 7
Views: 1959

Re: What BB do I need???

Eh??
by lackofgrip
26 May 2014, 4:34pm
Forum: Bikes & Bits – Technical section
Topic: What BB do I need???
Replies: 7
Views: 1959

What BB do I need???

I recently dropped on a bargain on ebay of a Control Tech carbon comp crankset.
by lackofgrip
26 Aug 2012, 7:24am
Forum: Bikes & Bits – Technical section
Topic: Old bike damaged BB threads
Replies: 14
Views: 1514

Re: Old bike damaged BB threads

Tanks for all replies and comments, I had it fixed at Butterworths in Hillsborough, £25 quid
by lackofgrip
15 Aug 2012, 9:14pm
Forum: Bikes & Bits – Technical section
Topic: Old bike damaged BB threads
Replies: 14
Views: 1514

Re: Old bike damaged BB threads

hERE'S MY FIXIE UP AND RUNNING!!!!!!

Image
002 by lackofgrip, on Flickr
Image
003 by lackofgrip, on Flickr
by lackofgrip
6 Aug 2012, 12:07am
Forum: Bikes & Bits – Technical section
Topic: Old bike damaged BB threads
Replies: 14
Views: 1514

Re: Old bike damaged BB threads

531colin wrote:It doesn't look too bad to me....I don't think you did that removing the cup, it looks like its had a clout from the outside.
Is the cup you removed OK?
If an OK steel cup will screw back in again, its good enough.
Any metal you remove will make the fit looser


The original cups were practically seized in, had to use a bit of brute force to get them out
by lackofgrip
5 Aug 2012, 10:15pm
Forum: Bikes & Bits – Technical section
Topic: Old bike damaged BB threads
Replies: 14
Views: 1514

Re: Old bike damaged BB threads

Cheers, any idea how much it will cost????
by lackofgrip
5 Aug 2012, 7:56pm
Forum: Bikes & Bits – Technical section
Topic: Old bike damaged BB threads
Replies: 14
Views: 1514

Old bike damaged BB threads

On extracting the old BB cups from a Raleigh medale i have dented/pushed 2 of the threads together.

Apparently it can be fixed by tapping out the thread again to force the threads apart

I was wondering if any one had a set of BB cutters like these : - http://www.ebay.co.uk/itm/230800707065? ... _778wt_906

Or someone in the Sheffield ? Rotherham area that could do it for me or that I could borrow???

Image
004 by lackofgrip, on Flickr
by lackofgrip
5 Jul 2012, 8:54pm
Forum: Bikes & Bits – Technical section
Topic: EDGE 500 HELP!!!!!!!!!!!!!!!!!!!!!!
Replies: 1
Views: 641

EDGE 500 HELP!!!!!!!!!!!!!!!!!!!!!!

Just updated my edge 500 and now getting the software missing message can anyone help as I'm no techie ???????
by lackofgrip
26 Jun 2012, 10:51pm
Forum: Bikes & Bits – Technical section
Topic: Helmet sizing annoying!!!
Replies: 10
Views: 1499

Re: Helmet sizing annoying!!!

I've took a punt on the Garneau

Watch this space. Hoping this fits as it says size wise it's a cm bigger than the others I've tried, let's keep those fingers crossed people!!! :mrgreen:
by lackofgrip
26 Jun 2012, 10:18pm
Forum: Bikes & Bits – Technical section
Topic: Helmet sizing annoying!!!
Replies: 10
Views: 1499

Re: Helmet sizing annoying!!!

Which part of head do I measure for the diameter?
Circumference is 63-64cm
I'm thinking of a last ditch to try this one

http://www.evanscycles.com/products/lou ... 4#features
by lackofgrip
26 Jun 2012, 9:49pm
Forum: Bikes & Bits – Technical section
Topic: Helmet sizing annoying!!!
Replies: 10
Views: 1499

Re: Helmet sizing annoying!!!

I think that look is out, it's just really frustrating!!
by lackofgrip
26 Jun 2012, 9:43pm
Forum: Bikes & Bits – Technical section
Topic: Helmet sizing annoying!!!
Replies: 10
Views: 1499

Re: Helmet sizing annoying!!!

The only one I like is the Louis Garneu one, but I'm sick of having to send them back when they don't fit