| Accessories | Bicycles | Parts | Specials | Tools |
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 104 mm BCD 4-bolt Chainrings from Harris Cyclery |
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| Accessories | Bicycles | Parts | Specials | Tools |
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104 mm BCD 4-bolt Chainrings from Harris Cyclery |
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For more technical detail see the B.C.D. entry in Sheldon Brown's Bicycle Glossary
We are not big fans of 4-bolt cranks, don't sell many of them, so we don't stock a lot of chainrings for them, but we can get them pretty quickly from Quality Bicycle Products.
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.
What we doWe are a small, service oriented bike shop.Although we primarily serve the Western suburbs of Boston, we are also available to cyclists throughout the planet. We can help with hard-to-find parts and accessories and good advice. This site contains a number of useful articles on bicycling and bicycles, plus links to other bicycle-related sites on the Internet. We are very proud of our problem-solving ability. We can often create custom solutions to your bicycling problems, adapting your bicycle to your specific needs. We make a bit of a specialty of updating high-quality older bikes with modern parts, for the rider who doesn't want to give up on an old friend, but wants more gears, better brakes, a more relaxed position, etc...
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How to reach usHarris Cyclery1353 Washington Street West Newton, Massachusetts 02465 (617) 244-9772 FAX 244-1041 We are located on Route 16 (Washington Street) in West Newton Square, about a mile and a half East of Route 128/95. If you are coming from the West, look for us just after Route 16 crosses the Mass Pike. We will be on your left, next to the European Health Spa.
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