ahhh geees.

[FyrFytrRyn]

well, i rode SR yesterday with some of you STR members. some of you may recall (especially todd "destroyer") that my rear brake was making alot of noise, but wasnt working. well aparently that little symptom leads to brake mount failure. i went to jump across (from one side to the other, not from lip to landing) the last jump on the 4x course. oh yeah, i landed it, but as soon as i pulled the brake, SNAP. tangled in the rear wheel and layed it down, i almost had it. anyhow, damage: totaled rotor, totaled mount, lost 3 spokes, front lever/perch was made ugly, notched the upper stanchion, and took a small chunk out of my swingarm. i called cortina almost immediately after it broke, and they sent it out. i should be getting it today (i love this company). i also decided to go from an 8" rotor to a 6". i assume this will reduce the stress that this mount encounters, extending its life, especially because an 8" rotor adapter sits so far away from the frame. heres a picture of what broke.

[northshore]

WOW!!!! That's nuts!! I take it you are ok after the landing?

[FyrFytrRyn]

yeah, im fine. wallet hurts a little thought.

[gil_caz]

that sucks, all that broke just cause i told you that little kids were clearing that jump.

and for all those that didnt go you missed out on kris kovaric(spelling?) ripping up the 4x track

we (I) were all amazed

[FyrFytrRyn]

gil, we needed popcorn for sure. i guess this is all your fault, how dare you.

[gil_caz]

just no more challenging little kids, we need to go get a beer after next time

[BrewMaster]

Wouldn't a larger rotor and longer caliper adapter put more stress on that part of the frame? My thinking is a longer lever arm can generate greater torque with the same force.

[FyrFytrRyn]

Originally Posted by BrewMaster

Wouldn't a larger rotor and longer caliper adapter put more stress on that part of the frame? My thinking is a longer lever arm can generate greater torque with the same force.

yes, it does put stress onto the frame (thats why im going with a 6" instead of an 8"), but first that energy needs to be transfered through the CNC'd mount. the mount is what failed. 80% of my braking is done in the front anyhow, i wont notice the stopping power of the 6" vs the 8"... speaking of, look what i just got! cortina rules.

[el_d00der1n0]

What is that? Is that a way to put discs on a non-disc frame?

[BrewMaster]

Originally Posted by FyrFytrRyn

yes, it does put stress onto the frame (thats why im going with a 6" instead of an 8"), but first that energy needs to be transfered through the CNC'd mount. the mount is what failed. 80% of my braking is done in the front anyhow, i wont notice the stopping power of the 6" vs the 8"... speaking of, look what i just got! cortina rules.

The mount and the frame are essentially subject to the same torque vector from braking. The mount would have more stress on it too with the 8" rotor in place of the 6", that was my point.

[FyrFytrRyn]

Originally Posted by el_d00der1n0

What is that? Is that a way to put discs on a non-disc frame?

its the brake mount. cortina designed it to interface with the swing arm, and to be a wear part, apparently. heres a backside shot of it. the other side is the sameway, but has the threads for the axle, and the der. hanger on it.

[FyrFytrRyn]

Originally Posted by BrewMaster

The mount and the frame are essentially subject to the same torque vector from braking. The mount would have more stress on it too with the 8" rotor in place of the 6", that was my point.

oh, yes. exactly. thats why im going to 6".

[BrewMaster]

Someone has spent a lot of time detailing Cortina Cycles on Wikipedia. Dang.

[Chewyeti]

not a fan of the "adjustable wheelbase' design.

That part should not have sheared. Looks like the decorative milling/machining on it weakened it.

[slowSSer]

Originally Posted by BrewMaster

Someone has spent a lot of time detailing Cortina Cycles on Wikipedia. Dang.

no kidding. some rather cool innovations. the DH looking tandem is a scary looking beast.

[FyrFytrRyn]

Originally Posted by Chewyeti

not a fan of the "adjustable wheelbase' design.

That part should not have sheared. Looks like the decorative milling/machining on it weakened it.

true, i was thinking the same thing, but it didnt break where any of the machining took place it broke closer to the bolt hole.. im pretty sure i know what happened. i used it at skateparks alot, and supposedly reverse braking forces weaken this part.

i love this bike. if you look at the wiki site Brewmaster linked, mine is the avalanche team bike (DHE-8, i love its suspension linkage, no need for the floating brake and its progressive, i sit at 45% sag and never bottom.), minus the fork. i personally like the adj. wheelbase, but im biased. lol.

[BrewMaster]

Originally Posted by slowSSer

no kidding. some rather cool innovations. the DH looking tandem is a scary looking beast.

I guess Wiki is their proxy website right now since the Cortina homepage is empty.

[FyrFytrRyn]

yeah, they had a homepage for a while. should be up soon, but they seem busy with making new stuff, most importantly incredible shock and fork upgrades for the internals.

[dirttorpeedo]

HEY ryan did you have them send a 6in rotor mount?

[FyrFytrRyn]

nah, i got one from somewhere else