Where can I buy the cheapest chainrings....
Moderators: Philip Whiteman, Andy Terry
- John Sanderson
- Posts: 114
- Joined: 27 Nov 2006 21:35
- Real Name:
- Location: Colchester, Essex
Where can I buy the cheapest chainrings....
Quite a timely post considering some of the other threads on the go at the moment....
I need to replace the chainrings on my winter/training/turbo trainer bike - and as it is quite frankly a 'nag' of a bike I want to do it as cheaply as possible....
I've already got Stronglight aluminium chainrings from Spa Cycles - replacements will cost me a grand total of £29 for a 110 BCD 38T and 50T with postage.
Can anyone recommend any cheaper sources?
I need to replace the chainrings on my winter/training/turbo trainer bike - and as it is quite frankly a 'nag' of a bike I want to do it as cheaply as possible....
I've already got Stronglight aluminium chainrings from Spa Cycles - replacements will cost me a grand total of £29 for a 110 BCD 38T and 50T with postage.
Can anyone recommend any cheaper sources?
It's all about the bike.
-
- Posts: 29
- Joined: 20 Nov 2006 15:19
- Real Name:
- Location: Birmingham (south)
chainrings
John..........if your not in a rush to replace your chainrings, why not consider going to one of your local cycle jumbles which take place this time of year
- Neil Compton
- Posts: 256
- Joined: 19 Nov 2006 15:39
- Real Name:
- Location: Northfield
- Philip Whiteman
- Posts: 2046
- Joined: 19 Nov 2006 16:17
- Real Name:
- Location: Drayton, Worcestershire
If you can face the long queue in the morning and the following bundle into the venue, try..
http://www.cycle-promotions.co.uk/
The next one is scheduled for Worcester on 28th
http://www.cycle-promotions.co.uk/
The next one is scheduled for Worcester on 28th
- John Sanderson
- Posts: 114
- Joined: 27 Nov 2006 21:35
- Real Name:
- Location: Colchester, Essex
pcd is the same as bcd - which is 'bolt centre distance'.Looking at the chainrings on the web i notice it mentions 135pcd or 130pcd or 144pcd etc etc. Just wondered if anyone could explain what this means in simple terms
I believe (although could be wrong) that this it he distance between the 4 or 5 bolt holes on the chain ring. Obviously this needs to be the same as the distance between the 4 or 5 bolt holes on the crank arm - otherwise you'd find it rather difficult to fit the bolts in!
It's all about the bike.
- Neil Compton
- Posts: 256
- Joined: 19 Nov 2006 15:39
- Real Name:
- Location: Northfield
- Andy Terry
- Posts: 904
- Joined: 20 Nov 2006 14:27
- Real Name:
- Location: Bromsgrove, Worcs
BCD = Bolt Circle Diameter
http://sheldonbrown.com/gloss_bo-z.html#bcd
PCD = Pitch Circle Diameter (the same thing)
http://sheldonbrown.com/gloss_p.html#pcd
http://sheldonbrown.com/gloss_bo-z.html#bcd
PCD = Pitch Circle Diameter (the same thing)
http://sheldonbrown.com/gloss_p.html#pcd
It's easier said than done, actually, because, most chainrings have an odd number of fixing points. This means that diametrically opposite each fixing point you will usually find thin air. So, to measure accurately, you've somehow got to draw a circle right through the centre of each bolt hole.Neil Compton wrote:Thanks John. I think i should just measure mine first before i order one.
However, measurement really isn't necessary. Just tell your supplier "I want a ring for ...". The supplier should know and, if he gets it wrong, the responsibility is his not yours. Besides, I'm as sure as I can be that you, Neil, need a 135mm ring.
- Andy Terry
- Posts: 904
- Joined: 20 Nov 2006 14:27
- Real Name:
- Location: Bromsgrove, Worcs
- Neil Compton
- Posts: 256
- Joined: 19 Nov 2006 15:39
- Real Name:
- Location: Northfield
Aye, measured it this morning with ruler although i didn't take the ring off to do it. Worked out at 135 which is what i've ordered and if i've messed up the measurement then serves me right for being lazy or i could just blame George instead. . Gone for a 44t.
I have another question for you though. I have ordered a cheap sora rear mech. Can i just use it as non index, ie just put the cable through and change with my levers as i do currently.
I have another question for you though. I have ordered a cheap sora rear mech. Can i just use it as non index, ie just put the cable through and change with my levers as i do currently.
- Neil Compton
- Posts: 256
- Joined: 19 Nov 2006 15:39
- Real Name:
- Location: Northfield
Ok fitted my new chainring. 135 was the correct size.
Another question.
I have fitted my new rear mech but the top of the cage is way too close to the freewheel in fact i think it touches. I've tried ajusting the top ajustment screw but that dosn't seem to be doing anything.
Anyone have any suggestions as to where i'm going wrong.
Another question.
I have fitted my new rear mech but the top of the cage is way too close to the freewheel in fact i think it touches. I've tried ajusting the top ajustment screw but that dosn't seem to be doing anything.
Anyone have any suggestions as to where i'm going wrong.
- Philip Whiteman
- Posts: 2046
- Joined: 19 Nov 2006 16:17
- Real Name:
- Location: Drayton, Worcestershire
Chain length? Does it need to be shorter perhaps?Neil Compton wrote:Ok fitted my new chainring. 135 was the correct size.
Another question.
I have fitted my new rear mech but the top of the cage is way too close to the freewheel in fact i think it touches. I've tried ajusting the top ajustment screw but that dosn't seem to be doing anything.
Anyone have any suggestions as to where i'm going wrong.
Try pinching a few links together and see what happens.