Will this ring fit the 2014 Boardman MTB Pro Hardtail 29er and does it matter if the 39 or 42 tooth ring is used
The bike spec is for a FSA Comet 368 39/27t chainset with PF30 bottom bracket. My existing chain ring is stamped BB30.
I can confirm this should be suitable without issue. It would be better to keep the ratios between outer and inner as close as possible to suggested spec as any dramatic changes in chainring size means the chain will either have difficulty in shifting from the smaller to larger ring, or would not shift at all.