b.o.b.o.b. (putting unwanted exercycles parts to good use)

[icyuod2]

no matter how fun a project is, sometimes ya just get burned out.
i could tell i was starting to loose steam on my build off bike. so this is my build off, burn out build.

i'm sure you know, yesterday i was at the brantford vintage bicycle show. too much fun! way too many cool bikes and well it inspired me to build. this is just a quick side project. i don't want to take too much time away from my rrbbo entry.

picked up a schwinn xr-7 a couple weeks back.

i wanted the sprocket for my bbo entry, but without changing the frame, it just wasn't gonna happen!
little did i know!
its been sitting in my back yard ever since.
yesterday i managed to get on old schwinn frame for $10 and the idea was born.

use up those gosh darn exercycle parts!

so heres the concept, schwinn frame collides with xr7


this is just another "using up what i got kinda build" ratty in it's truest form (well imo at least)
i love the giant sprocket idea. think i'm gonna go bigger and include the chainguard!



started by drilling out the rivets in the flywheel to seperate the two 1/2's.
inside i found a metal weight and black rubber edging. (which i might still use)
to my surprize the flywheel fit right over the one side of my shimano 3 speed hub.


and its almost a prefect match to the rim (if i use the black rubber seal, it fills the tiny gap between rim and wheel cover)


the sprocket side on the otherhand is gonna need some fabrication, but i think it will be well worth the effort.

even with a huge shim. the main sprocket still rub's the frame. yup we're gonna have to mod the frame just a little.

whats that you said? is that a 1" threadless headset on an old schwinn frame? how does he do such wonderful things you say
well todays your lucky day, i'm gonna tell ya.
ya use your dremel to take a little off the race, a little off the headtube (inside)
ya throw the race in the freezer, torch the head tube and very very gently, ya beat the heck out of itwith a hammer (and a block of wood to protect your investment.)

the forks are a set of triple trees from a cheap canadian tire full suspension bike.
the fork tubes themselfs are just stainless tubing with my custom flame drop outs (built a while back)
the xr7 speedo is coo also


all the xr7 parts are top notch due to a life indoors. its supplied me with all the bearings/nut's/bolts etc that i need, all in almost new condition.
if it stops raining, perhaps i'll bang this one out. later i'll use it as a platform to practice some pinstriping.

[HotRodRob]

That looks insane I love it!

[icyuod2]

thx rob!
and here i thought the $75 rusty bike was the bee's knee's.
shoulda bought all 3 schwinn frames.

[Sinner4]

Looking good.

[jandroart]

that build is going to be killer!!!

[icyuod2]

that build is going to be killer!!!

i've been thinking, with a giant flywheel in the back (this is heavier than most wheel covers)
3 speed gearing and no real place for a decent set of rear brakes.....
this may very well be a "killer build"

but on a positive note, that sprocket thing, weren't no thang at all!
i just had to cut enough room for the dust cover. there was practically a perfectly placed circular
impression in the steel . just followed it with a dremel sanding drum.

some foam tape (they sit on the spokes) and a handful of ss nuts n bolts is all i require!

[g-ratter]

That looks way cool if you can work out the details.

[FOUND OBJECTS]

LOVE IT!
I was wondering when a large chain sprocket was gonna appear on here from you.
I noticed it wasn't on the Skull-o-sis "yet".

[Half Link]

Very, Very Cool Idea!!! I really like it!

[icyuod2]

LOVE IT!
I was wondering when a large chain sprocket was gonna appear on here from you.
I noticed it wasn't on the Skull-o-sis "yet".

buddy you have no idea, how much i just wanted to cut the frame on skull-o-sis, weld it back up and have done with it. that sprocket would have looked at home on skull-o-sis. was gonna knock myself right out of the build off.
>< this close i tell ya. had to fight every ounce of my being to play by the rules and stick with the program.

man am i glad i did. almost like fate things didn't work out and i had all the parts i needed for an old stripped schwinn frame. didn't even have to go looking for em. they were right in the back yard.
had i of known, i probably wouldn't have left the spotless crank sitting outside in the rain for a week. oh well a little polishing to do.


btw, i'm allowed to change bikes once for my build entry, right?

[karfer67]

that is just plain sick. you should use the rear wheel weight and a drop stand. imagine getting it on the stand spinning it up then drop it off the stand i am thinking burnout lol. love the lines of this bike it just works

[Skipton]

ya use your dremel to take a little off the race, a little off the headtube (inside)
ya throw the race in the freezer, torch the head tube and very very gently, ya beat the heck out of itwith a hammer (and a block of wood to protect your investment.)
.

RIGHT ON!
I thought about doing just that.....but I never had the guts to give it a try
Thanks for all the great info
Bike is KILLER!

[XC204]

Just needed something to keep you busy? That thing is Bad A.. it does look right. Are there 2 wheel disks?

[icyuod2]

no just one wheel disk (2 halves)

i'd search for another, but 2 i think would be a little heavy.

couple quick pic's of the clearance issues i had to deal with
first, i had to grind one 1/2 of the wheel disks to fit over the sprocket side dust cover.


also had to make room for the crank sprocket. ratty engineering at its finest. (heat and beat!)


put the rubber trim back on the wheel disks. its a flawless match and seat up tight against the rim.
they pinch the rim tight and should allow me to use the fly wheel as a breaking surface.

[cman]

This build is heavy-duti. Digging the whole set up.