Dura Ace 7700 Shimano Splined Bottom Bracket: Road 9 Speed

Advantages: Top of the range "bling" rear mech
Disadvantages: 9 speed "only", superceeded by RD-7800 10-speed version

...I bought this rear derailleur to replace an Ultegra mech when upgrading my bike from 8 to 9-speeds (well, 16 to 18 speed really with my double front chainset). Apparently, this mech is also compatible with 8-speed systems, you just need to change the cable mounting position. Dura Ace is the name of Shimano's top of the range group of bicycle components, or "groupset", for road race bikes, and the 9-speed 7700-series was introduced to the public in 1997 after Shimano sponsored riders using Dura-Ace 7700 series equipped bikes in 1996. Year by year, it's been enhanced, and this review is of rear mech from the 2004 model year. For the non-bike-ophiles among you, the rear mech (or mechanism) is the device at the back end of the bike that moves the chain across the muliple cogs (cassette) on the back wheel to change gear - bigger cog... Read review

Ciao members have rated this review on average helpful

Advantages: Cheap
Disadvantages: Breaks easily

...I have had three or four of these because they were cheap, it turned out that in the long run it was cheaper to save up and buy a decent bottom bracket. Everyone of these that I bought broke in under a month, the same two faults occured each time. 1) Mud and grit easily get past the seals and wear out the bearings causing them to cease or rattle. 2) The ends of the tapered arms round off very easily, even during light XC and commuting use I have rounded them off. Steer clear and buy a decent bottom bracket, or even better get the new external type, or if your into jumping and DH get some 3piece cranks.... Read review

Ciao members have rated this review on average somewhat helpful

Advantages: built in external BB, good quality
Disadvantages: None

...I bought this to replace the SR Suntour cranks and stock Shimano Bottom Bracket on my Trek 4300. A fantastic upgrade, extremely sturdy, nice stiff cranks, excellent machine work. And to top it off, no internal Bottom Bracket is needed. Something I dont think a lot of the adverts for the item make enough of. You don't need to bother measuring your spindle as you just need to remove the entire bottom bracket and fit the M532 with the inbuilt external BB. You will need additional tools to fit this, but they can be picked up relatively cheaply and you never need to worry about wearing out any bearings in the bottom bracket again. It took me 15 minutes to fit, simply remove your old cranks, remove the BB and slot this in place. It comes with various spacers to adjust the width depending on your frame size and once fitted it... Read review

Ciao members have rated this review on average helpful