I bought an unused Boon ti 33t x 110bcd ring from someone on this site recently. So I know they exist. I don't know what they retail for, only what I paid (which shall remain a mystery...)Zanetti said:Boone used to make them on a special order basis.
74/110 came first, so when the smaller bcds came on the scene they were called "compact" and 74/110 was referred to as "standard." These labels are still used even though "compact" cranks are more common/standard than "standard" these days.sparrow said:Most common new cranks use 64 small, 104mm middle and big (or bash) 4 bolt circle diameter:
Of course there are a few different bcd cranks still made, but for atb, 64/104 4 bolt is the most common for Race Face, Shimano, etc.
Older bcd cranks can be found on ebay, etc, and chainrings are still made for most of them. ATB cranks were most common in 74/110, 58/94, 56/94, and now the 64/104
Yes, I bought a 33t x 110bcd from them back when they were known only as chainrings.com. Two, in fact. Those were 1/8" chain specific rings. Soft metal -- I wore the first one out quickly; don't remember if I ever even put the second one on.GlowBoy said:... Sparty, didn't you have a Warhawk 33t before you got the Boone? ...
And now road "compact" is 110BCD, same as the old mtb "standard".Sparticus said:74/110 came first, so when the smaller bcds came on the scene they were called "compact" and 74/110 was referred to as "standard." These labels are still used even though "compact" cranks are more common/standard than "standard" these days.
For heaven's sake, let's not start calling compact cranks standard or we'll get really confused when discussing them. I can see it now... A guy walks into his LBS and says, "I need a standard 34t chainring." Bike shop guy replies, "Old standard or new standard?"
The T/A has a bad reputation for wear. Check these out: