Cold Setting A Bike Chainstay

[DAMIEN1307]

Also... I notice my disc is slightly off. Not quite straight

Are you sure it is actually the disk or is it that you need to align your wheel to run straight and true in its current configuration...in other words, do you see an wobble in the wheel itself when spinning it and it is not on an angle at all when spinning???

 

[FrizzleFried]

Yeah... it's in the disc...

I just called to see if I could get a disc replacement... being amazon they insisted on sending a full set out. I told them i'd already installed the front rotor and would be tickled pink just getting another rotor...

...nope. They insisted on crediting back the full amount... where I get to go buy another set.

>sigh<

How/why do they do business like that? Seems they'd save lots of money offering replacement PARTS instead of replacement whole ITEMS.

 

[Sidewinder Jerry]

An even better way is the use 2 turnbuckles with spreading bars on the chain and seat stays about mid ways on them. Then also put 2 on each stay slightly above the brake mount to squeeze in. This should then put the offset in each stay you're needing. The U bolt with pin is what you'd use. I'd do this in addition to the video shown using the dropouts.

However, you may have to get a touch job on the paint. This should be a lesson learned. To fit a bike together first. Then tear it down to be painted.

 

[FrizzleFried]

What do you call that feeling in your stomache when you realize your dumb-ass hadn't put the damn PEDAL SPROCKET on the rim prior to installing.

I get to do this again!

At least I get to see if the tweak "stays" or if it goes back to the original size.

 

[Nickt919]

I had just shown a pic of my homemade header spreader this morning to another member.
Used it with the wheel on to open the chain stays a bit.
I made it from junk here.. scrap 1/2” rigid pipe, 1/2” allthread, and a 1/2” washer.
It will scratch the paint if you don’t insulate the stays.
Careful with aluminum frames.

 

[Sidewinder Jerry]

What do you call that feeling in your stomache when you realize your dumb-ass hadn't put the damn PEDAL SPROCKET on the rim prior to installing.

I get to do this again!

At least I get to see if the tweak "stays" or if it goes back to the original size.

After thinking about this you probably would have to put the turnbuckles near each other meaning you'd need a total of 4 turnbuckles. 2 would be for pushing and the other 2 would be for pulling.

For the first bends near the seat post you'd have to have the top 2 on both stays pulling in while the 2 underneath was pushing out. This should enable you to make between a 5°-10° outward bend. Then you could make the second 5°-10° inward bend for the offset by reversing the push pull direction. You're probably going to have to slightly move the turnbuckles 2-3 times for each bend, similar to what's done when hicky bending. Doing this any other way you risk kinking the stays. I did electrical work for 30 years and was very good at trig and running conduit.

 

[Sidewinder Jerry]

Here's a picture of what I'm talking about. The first bend would require 2 turnbuckles on the seat stays and 2 turnbuckles on the chain stays. After the first set of bends were made, then you'd have to make the second set of bends. Be aware the greater the degree of bend the closer it'll draw your dropouts towards the bottom bracket. If you decide to do this I can give you the multipliers to compute the distances between the bends.

You'd d most certainly want to practice on a kulker frame first. You might even be able to make bending shoes out of a tubing bender to put on the turnbuckles.

 

[FrizzleFried]

Looks like I am screwed regardless. There isn't enough room between the sprocket and the disc on this Grubee rim to FIT the damn disc brake calipers. Unless there are some "slim" versions where the back of the caliper isn't so wide ... I'm screwed.

I have about 3/4" to an inch at most between the disk and the sprocket. Unfortunately... they are also almost the same size (36t sprocket).

I might have to go RIM brake for the back and disc up front...

 

[FrizzleFried]

Well s**t. A quick search came up with "narrow" calipers at 18mm for the back... unfortunately i have MAYBE 10-11mm.

To say I am disappointed in these Grubee rims is quite the understatement.

 

[FrizzleFried]

Yeah... these setbacks are getting to me... what kind of piece of crap rim DESIGNED FOR A SPROCKET AND DISC doesn't have enough space between the sprocket and the disc to fit a caliper? I'm NOT going to email Don about this crap... based on his last emails to me he's not going to be much help anyway.