Man, that was a tough request. I had to do some digging, but I finally found the original invoice from the on-line shop where I bought it. The invoice is dated October, 2004 and the Avid disc brake assembly was listed as BR7082. Not sure what that means - an Avid part number or the shop's inventory part number. Anyway, it evidently dates back to pretty early in the BB7 scheme and you raise valid points about improvements that the manf. probably made over the last decade+. I keep saying "it" because I only bought one for the front and have a V-brake on the rear because back then Surly didn't have a good way of removing the wheel with those rear facing dropouts if it was set up with a disc brake back there. Looking back on the purchase, I think I would've used V-brakes both front and back if I had to do it all over again.
On Saturday, January 14, 2017 at 12:45:37 PM UTC-6, Patrick Moore wrote: > > Very good points, George. > > Question: what model/version of the BB7s are you using? Are they mountain > or road? New or old? > > For the record, all my disc setups (all 3 have been BB7s, 1 or 2 mountain > of the circa 2012 or so vintage; 2 road, one circa 2010, one 2016) have > been installed on bikes with hollow QR axles. I did notice some pad rub -- > but only sometimes! Usually after riding several miles in fine sand or dust > -- when I stood, this with the mt version and V brake drop levers; but not > with the current roads. > > If I were to replace my current BB7s, I'd look closely at the Spyres and > Klampers; but I am very pleased to say that, so far, I am very, very > pleased with the current version of the BB7 road model. > > Speaking to Garth's post: I think mechanical disc brakes are pretty well > sorted out by now, at least to judge by my late model BB7s, which > scuttlebutt says are not as good as Spyres and Klampers. They work pretty > damned well! > > Value for discs: IMO, only for dirty riding where rim brakes can wear out > rims quickly; and of course for wet riding, if you like. They also let you > use very light rims, like the Velocity Blunt SS: > > > http://www.wiggle.com/velocity-rims-blunt-ss-mtb-rim/?lang=us&curr=USD&dest=18&sku=5360699424&kpid=5360699424&utm_source=google&utm_term&utm_campaign=US_PLA_High+Margin&utm_medium=base&utm_content=mkwid%7csxoSZlk5w_dc%7cpcrid%7c96364502648%7cpkw%7c%7cpmt%7c%7cprd%7c5360699424us > > > > On Fri, Jan 13, 2017 at 4:21 PM, George Schick <bhi...@gmail.com > <javascript:>> wrote: > >> Patrick - I'd add one more item to your list. I've got a BB7 on the >> front of my Surly 1x1 and for years I had trouble with the pads rubbing the >> rotor, making noises while riding - just as Jan has pointed out as a >> potential shortcoming of discs. I tried everything; trued the rotor, >> changed the rotor to new, changed to higher quality pads, etc. Nothing >> worked as a lasting solution. Finally, I bought a solid axle to replace >> the QR that came with the hub, installed it, and *bolted* it onto the >> fork. No problems whatsoever since then including rubbing noise or >> adjustment issues. >> >> I'm concluding that *some* disc units on *some* forks (especially with >> QR) may present ongoing problems that only a bolted-on hub will prevent. >> Now, the BB7 is a lower quality mechanical disc unit so maybe high-end >> units are different. I also have an early 2000's Trek Fuel 90 MTB >> (equipped with QR hubs, BTW) that came equipped with Hayes hydro units and >> they were a continual problem - rubbed or even just plain locked up all the >> time. I final threw in the towel on 'em last year and upgraded the entire >> system to Shimano's highest-end brakes. Nary a problem ever since - smooth >> braking, no grabbing, no rubbing. And the LBS that I bought the Shimano >> unit from immediately acknowledged the PITA they'd always had with Hayes >> brakes. So maybe there are a myriad of factors at work and if one gets >> stuck with an unworkable set up they just have to experiment around until >> they find out what solves the problem. >> >> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
