Chainrings from Harris Cyclery
|130mm Road||110mm Road||74mm Inner Triple||Other Chainrings|
We stock a wide range of chainrings for modern and older crank sets.
For more technical detail see the B.C.D. entry in Sheldon Brown's Bicycle Glossary
Click here for Chainring Bolts
Measuring BCD: This 110 mm BCD ring measures 64.7 mm center-to-center.
Multiplying this dimension by 1.7 will give you the actual BCD for a 5 bolt chainring.
Use 1.4 for 4 bolt chainrings
|Chainrings for 5 Arm Cranks:|
Click on BCD size to see what we've got available
|151||44||88.8||Very old Campagnolo standard (pre '67) (Obsolete)|
|144||41||84.6||Old Campagnolo standard, still used for track applications.|
|135||39||79.5||Current Campagnolo standard also Miche track|
|130||38||76.4||Standard Road double and Road Triple middle, outer|
|128||38||75.2||Nervar (Obsolete, N/A)|
|122||38||71.7||Stronglight 93, others. (N/A)|
|118||36||69.4||Ofmega, SR (Obsolete, N/A)|
|116||35||68.2||Old Campagnolo (Obsolete, N/A)|
|110||33||64.7||Touring double, standard triple outer|
|94||29||55.4||MTB triple outer|
|92||30||53.3||Shimano Dura-Ace triple (inner)(N/A)|
|86||28||50.5||Stronglight 99, some SR triples. (N/A)|
|74||24||43.5||Standard ("full-sized") triple inner, used with 110 mm, 130 mm or 135 mm rings.|
|58||20||34.3||Some MTB granny|
|56||20||32.9||Sun Tour Compact granny (Obsolete)(N/A)|
|Chainrings for 4 Arm Cranks:
||104||32||73.6||Shimano XTR M960, XT, LX 4-arm outer
||64||22||45.3||Shimano XTR M960, XT, LX 4-arm inner
||6 Arm TA Chainrings:|
see French Parts
Chainring bolts for double chainrings, also work for the two larger rings of most triple cranks.
Set of five. The Suginos are more expensive than the generic ones but the steel is much harder.
Chainring bolts for Old Style triple chainrings, where all three rings are bolted together.
Set of five.
Outer two rings are 130 mm, inner ring is 92 mm.
Only available in 30 teeth.
T.A. chainrings are super-high quality, premium rings in Zircal 7075 aluminum. They have machined teeth, and a mirror-like finish.
T.A. triple conversion chainrings include the necessary bolts and spacers to attach a 74 mm granny chainring.
Classic T.A. Cyclotouriste cranks, chainrings and bottomm brackets are listed on our French Cranks Page.
There is a lot of confusion about the compatibility of narrow 9-speed chains with older cranksets. Shimano says you should replace the inner chainring(s) with specially designated 9-speed ones, but then they're all too eager to sell you stuff, whether you need it or not.
Shimano is also concerned about clueless users. The worst-case scenario is that you will be riding along with the bike in its highest gear (large front, small rear) and then for some bizarre reason shift down in front before downshifting in the back. (There is no shift pattern in which it is reasonable to shift in this sequence.) If you do shift this way, there's a small chance that the chain might "skate" over the edges of the teeth for maybe half a turn.
In practice this "problem" almost never materializes. Many, many cyclists are using 9-speed chains with older cranksets and having no problems whatever.
|Articles by Sheldon Brown and others|
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