Roadtopista adapter - Possible to make it work?
 

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this thing. Found an old thread here. Lot´s of bashing and mocking up, but it got locked.

So, the deal is:
I got a old Giant Aluminum frame here. Can't sell because it got 2 dents (and I don't want to be a ******* like the previous owner, who repainted the bike and sold it to me :mad:). I will not be riding geared bikes soon, and if I return to geared, will be with another frame.

sooo, I searched a bit on those ugly things, and got some ideas from some threads out there. So PLEASE let's just try to think together and see it this thing would work if I:

a - measure everything, making sure I can drill a hole in the frame for a extra bolt, to prevent it from sliding
b - JB weld the **** out of it, after a good cleaning and chaffing of the contact patches
c - give it a Cinelli Laser treatment, and just use bondo to get some better lines

of course, since I will be gluing it, I can just use a better bolt, and make it smaller/grind it, removing the "removable" status

someone also talked about reinforcing it with carbon fiber. With something like this
Carbon fiber plain tape - 50mm wide

so, after all that preventions, would that thing work?

I want a fixed gear (already got one, so I got plenty of time to test), and the frame is trash anyway. I know I can buy a WI Eno hub, but after a bad experience with Time bikes, I promise to never buy things with proprietary stuff again (as in the cogs from the Eno hub).

Here in Brazil I can't find a cheap horizontal frame (not anymore), and the adapter I found here, local, for a cheap price. So I would just use some bucks to try. By the way, I NEVER, never, never skid.

so what? Are you guys up for some franksteining or should i just toss this frame aside? :(

I'd rather ride a pogo stick than use that janky POS on my bike.

Pogo sticks aside, the inventor is actually a member here.

Those converters must work pretty well for there to be knockoffs to exist on ebay.

A product doesn't need to be good for someone to produce a knockoff.

I don't think welding and bondo-ing is going to improve anything. Just get the adapter and use it. Otherwise your options are to get a new frame or an eccentric bottom bracket if the frame is worth that much. It doesn't seem like the frame could possibly be worth that much. Or I guess you could do the magic gear thing.

I would only try something like that on a steel dropout. The type of stresses that will be created could cause a sudden catastrophic failure with an aluminum dropout.

yeah, the frame ain't worth that much. I build this bike one time, grinding the hub axle, so I could get a bit of adjustment. Worked fine, but as soon as the chain stretched, it started falling in bumps. I tried the magic gear combinations, but if I measured right, I got some really bad combos (like really low or insanely high...)

later I will get the measurements from the adaptor, print and cut a mockup on paper and see how it would fit on my frame.

PS: of course, if i try this thing, I will ride a loong time in a flat course here (30kms where I train, 3 times a week - not huge hills to kill me, just 1km or two with traffic, but with some bad tarmac parts). I believe that if something will fail, I will be able to see it before... :P

If I was poor/desperate enough to resort to this kind of thing, I'd probably figure out a at least near magic gear of some kind before doing this.

In the meantime, there's half-links, eccentric BBs, and the ENO eccentric hub to do the same thing, better.

Or get a real track frame... #kilott

Er, OP is in Brazil. Not so easy to find a Kilo TT there.

yeah, I can find just some chinese crappy full bikes here.

BUT, after some answers regarding the safety, and some thinking, I don't think I can save this frame. It's a really light frame (1360g for a 57 size :o), and a fairly used one. I'm afraid the harsh use from a FG setup would beat it to death sooner or later (lots of potholes and stuff). Put a heavy rider (90kg) on top of that, and it's a recipe for disaster. :(