How to install bigger chainring on bike with poor chainstay clearance.

[yatayata]

I have a focus Thron2 and I have really low space to fit a bigger chainring, actually I have a 34.
I’m trying to figure out if I can simply use direct mount and go with e-thirteen 36 chainring or should I go with a spider 104 and apply chainring on it. I’ve tried to search on internet info about chainline of the boost spider version but i haven’t found anything...
I need 52/53 boost chainline.

 

[Philly G]

It can be done, using a spider and 104bcd chainring, you might find this thread useful

Anyone Using Spacers to Fit a 36T Chainring

I love my rail 9.8XT but the one design flaw that pisses me off is how close the chain stay is to the stock 34T chainring. I know that the chain line is important but how much out of line can you go before it becomes a big deal? My bike is simply geared too low for the fast a flowly trails. I'm...

www.emtbforums.com

 

[Mikerb]

What exists? Bosch Gen4 + direct mount? SRAM or Shimano . 12 speed? Eagle?

Assuming you have a boost rear hub ( 148mm) your existing chainwheel set up with be 3mm offset ( 52mm). It is possible to get 6mm offset for Bosch Gen ( which is ISIS) , which is designed for super boost rear hub and that may povide the chainstay clearance you need but at the expense of a more extreme chainline in the lower gears on a normal boost hub.

 

[yatayata]

What exists? Bosch Gen4 + direct mount? SRAM or Shimano . 12 speed? Eagle?

Assuming you have a boost rear hub ( 148mm) your existing chainwheel set up with be 3mm offset ( 52mm). It is possible to get 6mm offset for Bosch Gen ( which is ISIS) , which is designed for super boost rear hub and that may povide the chainstay clearance you need but at the expense of a more extreme chainline in the lower gears on a normal boost hub.

actually i have slx shimano 12, i understand what you mean and onestly i never use the first 3 sprockets, could be ok using 55 mm of chainline with a chainring with 55 chainline?

 

[Gary]

 

[Mikerb]

actually i have slx shimano 12, i understand what you mean and onestly i never use the first 3 sprockets, could be ok using 55 mm of chainline with a chainring with 55 chainline?

I would think it would be OK for the highest 8 or 9 gears.

 

[yatayata]

I would think it would be OK for the highest 8 or 9 gears.

Thx Mikerb!