Snapped chainring teeth

I've managed to snap two teeth on my 49t 3/32 ofmega chainring.

LBS had a duraace for £40 (£60 retail apparently) 1/8" (rest of my drive is 1/8").

That's abit steep for me so I was wondering if anyone had recommendations on chainrings.

The BCD is across two arms right? missing one out..? I think it's 144mm or 135mm i'll check today.

Cheers in advance.
Toby

BCD is the diameter on which the bolts sit, hence: Bolt Centre/Circle Diameter.

Easiest way to measure it is radius x2, i.e. from centre of one bolt to centre of crank/spider, then double it.

also, theres only a limited number of (common) bcd sizes, from the shrimpy to the fat; 110 (road inner standard), 130 (road outer standard), 135 (campy standard), & 144 (track standard).

or, you could just take in the chainring it self and hold it up to the new one, matching bolt holes.

Thanks Chris, i'll measure to make sure.

Carlito, we did hold up the dura ace to the other.. so I think it's 144mm. But i'll have a quick measure.

Any recommendations on what brand to go for?

ive got a gebhardt (sp?) 49t that cost like 30£ and has never given me issue, as well as a shimano 48t that cost 5£ out of a used part bin that hasnt given issue either. probly more depends on how you ride, how much you ride, etc. what does your wallet tell you?

My wallet screams for mercy. my legs ride my work commute daily... as fast as possible. Are yours both 1/8"? I'll measure my BCD and check on prices. Thanks!

Just for reference, another way to measure (sheldon) is bolt to bolt x1.7 (for 5 arm)

144mm is what I need. I'll keep my eyes peeled.

Cheers again.

Sorted a new chainring and chain, went with sugino mighty competition 49t 1/8" only £20.

Running lovely and smooth now, as the chainring had been the last 3/32 component I was running.

Reps all round I think, cheers guys.

i run a 3/32 on front with rest 1/8" not an issue!

No, lots of people don't have a problem with the chainring being 3/32. But i've noticed an improvement moving to 1/8". Nothing spectacular, but a smoother feel. Possibly down to the old chainring.