Ok
So I want to use a set of middleburn RS7 on my 2007 orange patriot.
I will be running granny and middle ring with a bash on the outside.
I will be also using a blackspire stinger chain device.
Any one want to give me some advice on what length BB axle I should use. 113, 115, 118??
thanks
Run a 73-113mm on my orange 5...
You may also need to check theres clearance between the middle ring and the swingarm for the chain to move onto to the granny ring, but not sure if this is an issue with Patriots...
Copypasta from middleburn site:
Having the right BB length is crucial to having gears that work as well as intended.
Middleburn cranks run a 48mm chain line for cross country and 50mm for downhill
For a standard MTB setup a 113mm axle is needed for ISIS or square taper.
However, there are far too many variables to always be able to predict what bottom bracket you need. BB-mount ("E-type") front derailleur and chain devices can throw a stick in the works, as can a lot of oddly designed frames.
If in doubt have your local bike shop fit your cranks.
Doesn't it depend what type of BB you are using and how your Stinger installs more than BB axle length ?
Well the Patriot doesn't have ISCG mounts so it will be mounted with the bb shell, so i'd say 113mm (ISIS and Square Taper) will be fine, start going any longer and you'll be in bad chainline territory...
fingerbike,
thanks for that. do you run a chain device on your orange 5??
yep the stinger will be bb mounted
thanks
no problem. 🙂
Got an E-thirteen DRS with 36t-24t on mine...
thanks finger bike....
Hey Fingerbike - What middle ring are you running? I run a 36 which was catching the swing arm when shifting down to the granny ring. Had to fit a spacer behind the driveside External BB cup.
Would a 113 Square Taper still be correct?
I have Square taper RS7, running a 36t middle, needed a spacer behind the bb too, the chaindevice created that spacer.
73-113mm is still correct, any smaller and the cranks would pin against the bb and not move...