Built the wheels and got started on figuring out the rear braking. I think I have it sorted. So now I need to get a tab that I removed from the donor frame welded to this frame.
Super Spyder XL
- Thread starter CRASH
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Spread the frame to accommodate the freewheel and disc brake.
I also figured out where the “tab” needs to go, and it’ll get welded on this week. But today... on to modifying a 26” fender to make a rear muscle bike fender.
I also figured out where the “tab” needs to go, and it’ll get welded on this week. But today... on to modifying a 26” fender to make a rear muscle bike fender.
As I’m starting to test fit the back end, I’m realizing that the sissy is waaaaay wider than this Troxel seat. Which is odd because usually the troxels are the wider seats. So now I think I’m going to have to get a repop Schwinn-type sissy to fit it.
How can I “dimple” this chain stay to give room for the sprocket? I’ve never done it before.
Why not? Give it a try!
EDIT:
Sorry misread the comment. I don't know how you'd do that, maybe cut off a small section of the frame and then splice a concave piece back in?
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Squeeze it with a large C-clamp?
MattiThundrrr
Rattus All Terrainus
Can't remember who made it, but somebody here had a stay dimpling tool. It was a round tube welded to some vice grips
MattiThundrrr
Rattus All Terrainus
Nope it was a stem
@hamppea said
"Indented the chainstay easily with an old stem. Taped a piece of 5/16'' scrap from a cut axle inside. Can squeeze in a 20x2.20'' tire. No side deformation. Could go further for a 2.40'' but that will rub the seat stay.
"I shouldn't have used a threaded part to press into the chainstay. It left imprints after clearing the rust...was in a rush. Should use a little larger smooth cylinder with contoured ends next time. .... works and that's what's important."
@hamppea said
"Indented the chainstay easily with an old stem. Taped a piece of 5/16'' scrap from a cut axle inside. Can squeeze in a 20x2.20'' tire. No side deformation. Could go further for a 2.40'' but that will rub the seat stay.
"I shouldn't have used a threaded part to press into the chainstay. It left imprints after clearing the rust...was in a rush. Should use a little larger smooth cylinder with contoured ends next time. .... works and that's what's important."
That looks cool. I don't have one of those stems though.
I wonder if I could do the same thing with a vice? hmm....
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Looks like that fender bridge is gonna cause you headaches, too.
I'm just concerned about cracking the frame. I tried turning a steer tube into an oval with a vice and a sledge hammer for my RRBBO entry last year, and since I didn't heat the piece beforehand, it developed hairline cracks.
MattiThundrrr
Rattus All Terrainus
Search "diy chainstay dimple tool" and you'll see all kinds of ideas. Vice, c clamp, professional frame builder jig type things...
I like the "indentured servant" one.
A.S.BOLTNUT
He who dies with the most toys ,still dies No Fear
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Why you call me for some trivial ....
Good aim
Done it many times. Looks factory with pro dagger tools.
MattiThundrrr
Rattus All Terrainus
Why I gotta? Credit where credit is due. Posted your words and pic, wouldn't dare claim the glory
Way better than "Bobbit challenge!"
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Nah, not that... It's an easy enough task without all fanciness. They'll figure it out.
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I built the vice grips with a bit of half pipe on one jaw and a nub of solid rod on the other and it works very well. Depending on the thickness of tubing you may or may not need heat, but heating the dimple area will definitely help, if you don't mind toasting the finish. The next set I build will be made with the largest vice grips I can find (within reason...)
I do like the idea of using an old stem, but I can see the frame cooling as I crank each bolt into the block, back and forth diagonally trying to keep the pressure even. If you are thinking of making something, make this tool. You will use it more than you think when it's in your toolbox.
Carl.
I do like the idea of using an old stem, but I can see the frame cooling as I crank each bolt into the block, back and forth diagonally trying to keep the pressure even. If you are thinking of making something, make this tool. You will use it more than you think when it's in your toolbox.
Carl.
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