MSeries said:I've just read an interesting thread on rec.bicycles.tech about triple chainsets. Now I have
been considering changing my double to a triple on my best bike so I can get more use out of it.
Instead of a new C/S how about one of these conversion devices that 'add' an inner chainring to
a double ? I believe Spa Cycles have them and I will check this out soon. Does anoyone know of
any online pictures of the devices ? I have searched but found none. DO any other UK suppliers
have them ?
The device is simply a chainring with extra tabs and holes to take an inner ring.
eg. www.sjscycles.com/store/vIndex.htm?item3973.htm
Might be a 135mm version (for Campag) too (?).
Settle Cycles will probably offer the lowest price (beating SJS by loads) if they can order one -
although I can't see on on their distributor's site:
chickencycles.comindex.htmlOpen ↗
There are other brands as well - may be cheaper. Check eBay (I think I saw one there the other day
but that could be my memory playing tricks).
Quoted message said:Has anyone got any experience with them ?
Not me.
Quoted message said:Are there any problems with these devices ? Of course I understand a longer BB will be needed too.
Should work ok except for some added flex from the granny (longer BB may also be less than ideal). I
can't think of any major problems but a triple crankset would probably be better.
If Campag, there won't be any need for a different BB if existing one is 111 or 115.5mm and new
cranks are Xenon/Mirage/Veloce/Centaur/Racing T (Mirage cranks are just as good as Centaur & RT's,
it's the rings that are different). Rings can be sold to recoup some of the cost.
~PB