chrisbmx116-
Mtb, paired with the correct, long pull levers.
I’ve said it before but I suspect that there are a lot of these hooky/grey market BB7s kicking about and I think they are what ruins peoples’ opinions of them.
Over the years I’ve had a lot of them through my hands and some (like the ones I got from aliexpress) just cannot be made to work nicely whereas others will set up really nice and work hassle free.
I have noticed some dodgy looking BB5s on the likes of Aliexpress too but not in the same volumes as 7s and you don’t usually have to look too hard to find some used ones on eBay getting sold for absolute pennies so more worth the gamble.
If they were both good quality and well setup I don’t know whether I’d take a 5 over a 7 but I know Ed reckon the 5s are a bit stiffer due to their one piece construction.
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M_V
This.
I bought some cheap bb7 from aliexpress for my mtb and was underwhelmed (I have bb7 on a couple other bikes and really like them). Swapped to some old beat up bb5 from ebay and braking is so much better.
Suspect the bb7 were seconds (I stripped them down and found 2 washers where there should be one in one of them but even after rebuild they weren't great) or just downright fakes.