Bike porn

uh-o

slightly different take on bike porn
http://fuckyeahgirlsandbikes.tumblr.com/

wac

Has anyone using a modern open system disc brake ever experienced overheating? I've not heard of it ever happening. One mtb race which certainly puts the brakes to a test is the Megavalanche. It drops 2000m in 30km, not all the race is down though but there are sections where you're on the brakes not far from constant for several minutes.

I think as well as the lower end of the fork need needing strengthening to put up with the torque it will need something for it to put up with the heat. Apart from that I see no real problem.

@ Brickman. I've been using discs on my MTB for years too. They are completely wicked. However I rode an Alpine decent in Chamonix (on the road) on my MTB. By the end of the decent both my 160mm Hope mini monos were useless. the brakes didn't work due to heat, discs were purple and the front one slightly warped.. I only weigh 11.5 stone.

Purely from a design point of view it would be good fun to try and design something for a road bike. Trying to get something super light that tucked neatly behind a skimpy road bike fork leg, yet still with massive power.

Hope came out with a 'twin' disc system a few years ago when they altered the mono range. The two disc surfaces had angular cut ventings so to encourage air to exhaust from between the two closely spaced discs to the outside (or vice versa), and from what i'd heard, in the UK, waste of time, but on alpine stuff, yeah they seemed to make a difference, though how much was the clever venting and how much was just by doubling the amount of steel I don't know!
I think there is certainly a space in the road market for well thought out disc system, but beefier forks would defo be needed, not just in the leg, but the crown and especially the crown/steerer tube interface, no carbon there please!
Only ever seen a handful of disc mounts being ripped off fork legs, they were all on pinkbike years ago, and mostly the PITA post mount that most fork mftr's have moved back to, as post mount just plain has less surface contact area with the fork leg, engineering fail IMO. ISO was ISO for a reason, it was just better O_o

Also worth mentioning brake usage. If you drive an auto & a manual car over a mountain pass, you don't drive them the same, on the way up OR down. Most auto's have bigger brakes but they need them (not talking about modern autos, just them aweful american style free-wheeling things), but still, its short sharp stabs at the brakes, no dragging.

get oot

not Brickman, Jamesprw up there.

Was just wondering why the guy that posted it hadn't been flamed. So clearly not porn...

Like I said,

beefier forks would defo be needed, not just in the leg, but the crown and especially the crown/steerer tube interface, no carbon there please!

The fork crown doesn't need beefing up. The limit of braking is an endo whatever brake system you have, and full carbon forks have demonstrated that they are well up to surviving this condition. Changing the type of brake doesn't affect the load on the crown, that's just the bending moment caused by the horizontal retardation force at the tyre multiplied by the vertical height from ground to fork crown. There are caliper reaction forces to deal with on the fork leg at the caliper mount, which bend the fork leg, but by the time the leg has transmitted them to the crown area, they are no greater than the caliper reaction usually applied to the fork crown by a conventional road brake. There is also a disc reaction force which tries to eject the axle out of the dropout - roadies may be about to discover this just after MTBs got forward facing dropouts or through axles to deal with the problem.

shit photo but nice biek.

I posted this very photo a couple of weeks ago.

[div]Oblig lightweight gearing comment[/div]

Do you even know what you were talking about just now?

Btw, i didnt appreciate the fact that this framebuilder just took the whole drivetrain off of his greenbike that won NAHBS last year and threw it onto new frame, which he didnt even care to paint. Wac.

And the saddle. And the grips i think too

The frame builders were asked to take a naked frame.. hence the reason why it isn't painted.

revenon a nous mouton, labor, 1910.

incredible.

^re

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Looks like DA 10pitch.. Probably not so lightweight as it seems..

Do you even know what you were talking about just now?

Looks like DA 10pitch.. Probably not so lightweight as it seems..

I'm calling sarcasm recognition fail

fark yes

I like the white/blue but not such a fan on the placing. If they'd kept the white to the inside of the front triangle then blue for the inside of the rear triangle I'd like it even more

Do you even know what you were talking about just now?

Btw, i didnt appreciate the fact that this framebuilder just took the whole drivetrain off of his greenbike that won NAHBS last year and threw it onto new frame, which he didnt even care to paint. Wac.

And the saddle. And the grips i think too

That's what keeps you up?

"...i didn't appreciate..." sounds funny in that context

Do you even know what you were talking about just now?

Btw, i didnt appreciate the fact that this framebuilder just took the whole drivetrain off of his greenbike that won NAHBS last year and threw it onto new frame, which he didnt even care to paint. Wac.

And the saddle. And the grips i think too

Sometimes i dunno if you're trolling.... or you're just really, really into this whole business.
Either way, no need to go all apeshit about DA 10pitch, every.single.time you see some.
;p

OK now I really want this

is that...?

tt brake lever