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Discussion Starter · #1 ·
I finally finished up my first complete build. It's a large grey 05 Heckler. Can't wait for finals to be over so I can get out on a ride. Let me know what you think of the part spec and if you have any changes or suggestions, positive or negative...no offense taken. Thanks.

Fork: 05 Vanilla 130 RLC
Shock: 05 DHX 5.0
Bars: Titec Hell Bent riser
Headset: FSA Orbit XL
Stem: Thomson
Post: Thomson
Seat: Selle Italia Flite Trans Am
Cranks: RF Atlas X-type
Cassette: XT
Rear Der: Sram X-9
Front Der: LX
Shifters: Sram X-9
Rims: Rhynolite XL
Hubs: XT
Tires: Kenda Nevegal 2.35
Brakes: Hayes Hydros w/ 6" rotors (from my previous bike)
 

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aka baycat
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Maybe throw an 8" rotor on the front, world of difference in my opinon. But the SRAM x.9 stuff is quality no need to get the x.0 stuff if you are going to abuse your bike.
 

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Discussion Starter · #3 ·
I've been considering an 8in front rotor but im a little leary...seems some people don't think it's a good idea because of the strength of the QR axle...
 

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aka baycat
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All the more reason to get a pike with the 20mm maxle :)

I have never heard of that being an issue, is the concern that the QR could break in some way under braking pressure?
 

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Freeriding Feline
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Pics?

Do you have any pictures of it yet?
The DHX is a fine upgrade. I replaced my Progressive with it.
 

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baycat is right

The 20 mil and the 8" will be right on the bike you have in mind to build. You will not be sorry for opting the Pike for the Fox either. I has the same features as the Fox and they work great.
 

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Discussion Starter · #7 ·
Yeah...apparently some people have snapped the QR axle. I guess it makes sense because the 8in rotor does produce more torque since the caliper is located about an inch further away from the hub as opposed to a 6in rotor. I'm thinking of going with a 185mm rotor, which should be a good compromise. Does anyone know any manufactureres that use 185mm rotors...all I know of is Avid.

(can't figure out how to upload pics)
 

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need2ski9 said:
Yeah...apparently some people have snapped the QR axle. I guess it makes sense because the 8in rotor does produce more torque since the caliper is located about an inch further away from the hub as opposed to a 6in rotor. I'm thinking of going with a 185mm rotor, which should be a good compromise. Does anyone know any manufactureres that use 185mm rotors...all I know of is Avid.
Hayes now makes 7" rotors and brackets, not sure of stock or availability yet anywhere. Both Avid and Hayes 8" rotors are 203mm, both Avid and Hayes 6" rotors are 160mm. Avid 7" rotors are 185mm, I don't know, but would expect the new Hayes 7" rotors to be the same 185mm. Hope 7" rotors are 180mm, not 185mm, but you can get Hope Gothic replacement rotors in 185mm. Other than what I don't yet know about the new Hayes 7" rotors (185mm or 180mm), Avid rotors are interchangable, and so are the caliper mounting brackets.

Fox says you can run a 7" rotor with a QR dropout fork, not an 8". The other fork manufacturers may say something similar, but I have noticed that this does not stop bike companies from frequently OEM specifying 8" rotors on QR forks on many new bikes. The concern is that the additional force from the different fulcrum of the caliper mount with a larger rotor could cause the front QR wheel to move, but it would not come out because all QR fork dropouts made today have "lawyer" tabs or a recess around the clamping surface to eliminate your wheel coming out, even if loose, which you would diffinately feel first.

I run 7" (Avid) rotors on the front of my Monocog ('06 TALAS 90-130), my XC hardtail ('05 Reba U-turn 85-115) and the front of my Cannondale cyclocross bike (rigid). All are QR, no problems. I bent the lowers on my '03 Fox Float RLC 100 that used to be on my XC HT with a 7" rotor, appears to be twisted in the exact direction excessive brake force would twist a lower. Had a 6" rotor on the front of that one for the first two years I rode it, so not sure. I run 8" rotors on the front of two other bikes with 20mm through-axles, and a 7" Avid rotor on the Fox 36RC2 on my BLT. I thought of swapping out the front 7" for an 8" rotor on the BLT because I can, but I don't need it and it would just be heavier. I do notice the difference with 8" rotors on my 43 lb. Bullit for what i ride down on it, but doubt I'd notice a justifyable difference from swapping the 7" for an 8" front on the 30 lb. Blur LT, I ride it as a FS trail bike, I don't bomb down a mountain at 40+mph on that bike. And while climbing techy stuff on that bike (where it doesn't matter what brakes you have), I'd be more likely to smack a bigger rotor on a rock than a smaller one.

My 2 cents.

Dave
 

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Discussion Starter · #10 ·
Thanks for all the info. I guess I'll just ride with the 6in front and rear rotors for the time being and see how it feels. The never felt under-powered on my XC bike so maybe they will be fine on this one too. According to the fox manual you can run up to 200mm rotors on the vanilla, so I guess I should be pretty safe with a 180 or 185.

Anyone have an opinion about bolt on axles, or know of a way to convert an XT front hub to either a thicker or more solid axle?
 
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