Does anyone know the number of links your chain should have if you run -1 front and +2 rear?

I know stock is 108 links with 15 front 43 rear.

 

I can tell you that I went up +1 in the rear, and I had to use 109 links. I would think with the -1, +2 you could leave stock size, but that is just a guess.

 

im thinking that 109 is probably perfect, but i figured i would ask someone who might know for sure.

I guess if you went 109 with +1 that 109 with +2-1=+1 would be good too my math skills rock! lol

 

Are you sure that 15/43 is stock? I only ask because gearing commander is showing 16/45 as stock on an F2, but 15/43 on the F3?? Both with 108links.
Regardless, I don't think a -1/+2 is gonna make a difference if you use the same chain. Just have to move the wheel a hair. I think the overall length change is like 3/10ths of an inch....

 

I am sorry, I meant to say I went up +2 in the rear with a 109. And my sprockets were stock when I took them off, and they were 15/43.

 

yep, definitely 15/43. f2-f3 use the same gearing.

 

So is 109 correct for -1/+2 ? Or 108?

 

109

 

yes gearing comander says 16 43 for the f2 dont know y maybe somebody should email them.

 

15/43 is definitely stock.

109 probably works. I've always just gotten big chains and cut them down myself to whatever fits. Never bothered counting...