Bicycle Mechanics - chain devices

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prophetbike
02-22-05, 04:41 AM
hey hey . im just lookin for a bit of advice from you guys. i have a spooky metal head wich i have always had trouble keeping my chain on. can any of you guys shed any light ?
im looking at replacing my cranks to some saint's and running hopefuly if it can be done some sort of chain device (mrp system 3 or e thirteen ) i know i will have to buy some wonder cups. will it work will the chain line be out . also are the three bolts on the wondercups (bb converter) the same as iscg mounts so could i just bolt it all on and be done with it ?
the main problems im worried about are the width of the compleated set up especialy as the saint bb has external bearings and weather it will work
thanks for your time
prophet

jeff williams
02-22-05, 09:57 AM
How many rings? Also, you can simply re-tension the derailler with a second stay mounted tensioner. this works well until you start jumping with the chain on your smaller cogs.
The slack causes the chain to jump off the top of the ring -the longest un-tensioned length (mine anyway).
The upper pulley is more important to get, I'd not get a guide..but a pulley. This tensioner (upper) is under high stress, usually bb mounted.

Secondary (lower, if you have a derailler) can be simply mounted under the chainstay.

Mono- ring I'd look into sandwiching the ring,-not sure about bb mounted tensioners for double cranksets.

Stuff:http://www.bikeforums.net/showthread.php?t=88841

Devices:
http://www.bikemagic.com/review/reviewcategory/mps/RGN/3/RCN/27/v/6/sp/332336698220342207340
prophetbike
02-22-05, 10:26 AM
thankyou for your help ill look in to it