Boost Chainring 3mm or 6mm?

[lyslexic]

Hi

 

I currently have a 32t chainring and want to swap out for a 34t chainring. 

 

I am a bit confused about which chainring to buy as I see they come in 3mm or 6mm.

 

 

This is the crank that is currently on the bike:

SRAM NX, Boost, direct-mount X-Sync

 

The chainring just says: SRAM 32T Eagle technology x-sync 2 (no info about 0mm or 3mm or 6mm)

 

 

 

and it is a NX 1x12

 

 

Also, would I need a longer chain?

 

 

 

 

[dirtypot]

Boost is 3mm

Non boost is 6mm

[AeroTucker]

Both Copperhead and Dirtypot are right. 3mm offset for a boost bike but be sure to check if your chain is long enough to accommodate the bigger chainring

[lyslexic]

Thanks guys

 

will check chain length and get the 3mm.

 

 

This is just to accommodate the current amount of tar / pavement riding i'm doing. have seem to run out of gears. 

 

If the chain is short, might leave it and use not use the 50T in the back as i will prob need to go back to 32t to climb up the hills on the gravel. but if i do get fitter then will add the extra 2 links. That was the reason for the question.

[Rigardt@Scott]

Both Copperhead and Dirtypot are right. 3mm offset for a boost bike but be sure to check if your chain is long enough to accommodate the bigger chainring

Good idea in general to replace the chainring when you replace the chain. That is unless the chainring has very low mileage.