Are these fake Avid BB7?

[tomtom123]

Are they fake? They seem to be too low price for a pair.
http://www.ebay.com/itm/New-2012-Avid-BB7-Mountain-Mechanical-Disc-Brake-Calipers-HS1-rotors-160mm-/230831140772?pt=US_Brakes&hash=item35be9bafa4

 

[TheBeastie]

Says 1,211 sold so I would assume you would be able to dig up a post somewhere on the net saying there fake.
The seller has been there since 2009.
I bought a set of BB5 brakes on ebay and they work great. I bought my BB5 for about $50 delivered.
I notice some people have trouble fitting BB7 brakes as they are fatter and rub against hub motors. The BB5 don't at least for my bafang motor. You should be able to find a fair amount of posts on here of people grinding down there BB7 to fit with their hub motors.

 

[dannyboyohyeah]

Those look like the absolute real Macoy to me. I use em and they fit with both BMC and 9 Continents alright.

 

[teklektik]

They look okay and are 2012 which are fine - I've picked up a few sets 2012 BB7s from Price Point over the last couple years at good prices.

The current offering at PPoint is $49 for a 185mm - with shipping two sets are $110.
The Hong Kong eBay price is $70 for two sets of 160mm which doesn't look out of line for a slightly smaller rotor at Pacific prices.

 

[tomtom123]

They look okay and are 2012 which are fine - I've picked up a few sets 2012 BB7s from Price Point over the last couple years at good prices.

The current offering at PPoint is $49 for a 185mm - with shipping two sets are $110.
The Hong Kong eBay price is $70 for two sets of 160mm which doesn't look out of line for a slightly smaller rotor at Pacific prices.

do bigger rotors like the 185mm really provide that much more stopping power than the 160mm rotors?

 

[Ypedal]

some mention

http://topsecretev.com/blog.php

 

[teklektik]

do bigger rotors like the 185mm really provide that much more stopping power than the 160mm rotors?

With a longer moment arm a 185 should give better braking than a 160 (15%), but once your brakes are good enough to easily lock up the wheel, it may not matter much. Talking about rotor size and disc vs rim is an invitation for re-opening a couple of endless debates, so you can pretty much believe what you want here - someone will back up that perspective...

Anyhow, a bigger rotor gives better cooling for long downhills but probably most importantly, moves the caliper closer to the rim. If you have a motor with a curved side cover or small body diameter, this can buy you added clearance to avoid customizing the caliper adapter. For instance, 203mm are often recommended for MACs for just this reason - not the stopping power.