ColinJ
Puzzle game procrastinator!
- Location
- Todmorden - Yorks/Lancs border
Like this...!
What do I need?
- Thread starter Deafie
- Start date
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Yellow Saddle
Guru
- Location
- Loch side.
Stop fiddling. It is square taper!
But, only your middle ring needs replacing.
But, only your middle ring needs replacing.
Deafie
Guru
- Location
- So good they named it twice
Excellent, thanks.
Deafie
Guru
- Location
- So good they named it twice
Will any 5 bolt 36 tooth chainring fit?
This can work and I have used it as an emergency fix by the side of the road before, but it knackered both the bolts and the allen keys.
Deafie
Guru
- Location
- So good they named it twice
And are all crank extractors the same?
Over time there have been differences, but yours looks like the current shimano crank extractors.
But if your plan is now to just change the middle ring,, then you don't need to remove the cranks.
Deafie
Guru
- Location
- So good they named it twice
I looked on ebay and they have crank extractors for square taper.
I no longer have access to the bike so the project is going to have to wait now anyway. Thanks
Yellow Saddle
Guru
- Location
- Loch side.
Not really. Press-on cranks come in three varieties I can think of. Square taper, Octalink and ISIS. The extractor for these three differs slightly, but the problem is usually solved with a little adapter that comes with the extractor. Octalink and ISIS have hollow spindles, so an extractor's contact point that works with square taper, will just disappear inside the hollow. A gadget (usually a little magnetic thingamabob) then fits over the end of the extractor's contact point and covers the hole in the spindle.
When using a crank puller/extractor, always make double sure the crank bolt washers are removed from the crank, otherwise you strip the crank threads.
Ajax Bay
Guru
- Location
- East Devon
Your crankset probably requires a 110mm BCD ring but well worth measuring (when you get access to the bike again) before purchase.
Sheldon Brown's cribsheet will allow you to identify the BCD from a measurement of the distance between two adjacent bolt holes (c-c).
Spa Cycles is a good source of chainrings.
As @Sharky says, you don't need to remove the crank to replace the middle/outer chainrings.
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Deafie
Guru
- Location
- So good they named it twice
I appreciate the helpful comments
I did the opposite (st to Octa), as an attempt to get rid of a rather big new chain tension variation that I didn't have with two older bikes equipped with Octalink v2 (Hollowtech) that wasn't an option now due to chainline.
The attempt failed that goal - still the same tension variation.
But now I have Octalink 1 and I've read several times here what you say here again.
Can you explain what the problem(s) is (are)?
Cycleops
Legendary Member
- Location
- Accra, Ghana
I understand that that they can come loose, especially if refitting and it's not torqued up sufficiently. If it does come loose then damage may occur and it may not be possible to ever get it tight again. I think Shimano have now discontinued it.
Google "problems with Octalink" for the stories.
Google "problems with Octalink" for the stories.
