[xcguy]

I've had BB7s on another bike for over a year. I know how to break them in and how they should feel when properly broken in (new pads and new rotors).

I just put an '06 BB7 with a Roundagon rotor in front and a previous year BB7 (seems like the instructions always say 2002!) with a Clean Sweep rotor in back on another bike. Did 40 long stops to break both in, like a good boy. Well, the rear Clean Sweep broke in just fine, lotsa stopping power. The front Roundagon was basically worthless after 40 stops. The rear was working so good it had me fooled till halfway through my first real ride when I realized the front wasn't working at all.

I know there's always the chance that the front rotor got contaminated with grease or something and that's the reason. I'm going to clean the p!ss out of it (hope the pads aren't contaminated). My question is: are the Roundagon rotors made from some different material or whatever that makes them much longer to break in? After today's ride it sorta stops, though I can't lock it up. The rear is just like my other ones, one-finger lockup.

 

[xcguy]

someone has to have an opinion about this-Shiggy?

Has no one out there broken in a new Roundagon or does no one out there know whether it's made differently that would account for it's "unbreakinability?" Shiggy?

 

[eddieselement]

20 stops

i have read an article that on the internet nthat said to do 20 to 25 stops by getting up to speed about 16 mph and then apply both brakes and come to a gradual easy stop not hard then start over again. I have had my BB7's for about three months and there fine although did take some time to break in. i decided not to worry about it and just ride and use them when needed. around ny hometown we have some tuff trails and Im not good enough and confident enough to let the bike fly so i ride them sometimes for 60yeards down hill and they have gotten hot enough to smell but no fade lthough the sound changed because of the heat but there strong and ready to stolp me. I use the front and rear although more on the front. Seems break in is a differnt thought by everyone. the one to ask is xsl_will

 

[xcguy]

OK, then, XSL_Will--your opinion please

I know how to break in a new set of pads and rotors, but thanks to the above poster. Plenty of newbies wonder what the correct process is. The question is, are the Roundagon rotors of a different material or manufacturing process that makes them harder to break in (a longer time of no braking power) than the Clean Sweeps?

 

[Eric Hoefer]

My brother has BB7's with the roundagon rotor and it took him about 25 solid stops to reach about 80% power then a 5 mile XC ride got them almost full and after about 400ft of the way down hunter mountain they reached full power, as for a different matierial Im not sure. Do the pads feel slick when they hit the rotor? if so they may have gotten contaminated and the only guaranteed way to get full power back to the brake is to take the front wheel off clean the rotor thoroughly with rubbing alcohol replace the pads and break them in as normal.

 

[ANdRewLIu6294]

you dont HAVE to replace the pads, i've contaminated my pads before, and i just baked them in the oven at 315degrees for 15min, and then break them in again. they work fine.

 

[rkj__]

I picked up some 2006 BB7s earlier this year. I installed them the day before a 24h race. I made as many stops as i could that night around town, but they still were not at full power. After the race however (103km for me) they were fine I felt the power improve as the race went on.

 

[tmp]

I've got 2 bikes with bb7s, one with cleansweeps and one with roundagons. The cleansweeps just seem to "bite" better and feel a lot stronger.

 

[xcguy]

Roundagon--an inferior rotor? But why?

I've got 2 bikes with bb7s, one with cleansweeps and one with roundagons. The cleansweeps just seem to "bite" better and feel a lot stronger.

I remember checking out some BB7s on ebay. A guy selling a set that had Clean Sweeps said that they were 2006 calipers but with Clean Sweep rotors (how he wound up with that combination I don't know), but he preferred the CS over the R. He didn't elaborate and I didn't think anything of it. I can tell you my CSs just grip like a sum***** while the R still seems to not really want to stop me. If that R doesn't come around soon it'll wind up in my bikesparepartsbin and never see the light of day again. Unless somebody shoots me an offer for a rotor that doesn't work. Sold!