A friend recently purchased a cheap BikesDirect road bike with cheap down tube shifters. They are indexed for 8spd cassette but cannot be tightened so as to hold the cable from slipping to a smaller cog. I thought that possibly there was too much paint on the boss or the threaded insert had flashing keeping it from being tightened down but clearing those issues brought minor improvements. I didn't want to overtighten it as the frame is aluminum and the boss appears to be as well. It tightens on with a small 3mm Allen screw. Anyone familiar with a BikesDirect Dawes Lightning DT with Sunrace shifters?
2008 Novara Randonee - love it. Would have more bikes if I had time to ride them all. Previous bikes: 1968 Motobecane Mirage, 1972 Moto Grand Jubilee (my fav), Jackson Rake 16, 1983 C'dale ST500.
No way to tell without being there but the odds are something is not aligned properly or is broken or missing, so as to not allow tightening. Why not at least call Bikesdirect to see if they can assist or send a new lever unit?
1974 Motobecane Le Champion, 1975 Grandis Special Gran Prix, 1988 Hujsak C Record Custom, 2010 Motobecane Le Champion CR Ultegra, 2011 Brian Baylis Special custom Ultegra, 1982 Ritchey Mt. Tam mountain bike
Originally Posted by LeeG
I'm wondering if a thin washer would help if the attachment screw is bottoming out on a poorly threaded boss.
I agree. Chasing the threads with the appropriate tap could likely solve your problem. I purchased a metric tap and die kit years ago. An inexpensive one will suffice for occasional use.