Scrambler Questions?

[coasterbrakejunkie1969]

Hey , I have as '75 Scrambler frame and fork that I was wanting to build up. My frame has no front chain guard mount and I see advertisements showing bikes wait a guard on the sprocket itself I think the are called rock guards? I wanted to know if anyone had a Scrambler like this and could get me some pics of the crank, sprocket, pedals, and stem from that year or a year that was similar. That way I will know what to look for. Anyone has parts for sale please contact me.

 

[coasterbrakejunkie1969]

I found some pics from @birdzgarage of his '75 it is killer.

 

[bloo]

Linky?

Is this a scrambler specific part or just some Schwinn part that can be found elsewhere?

 

[coasterbrakejunkie1969]

Linky?

Is this a scrambler specific part or just some Schwinn part that can be found elsewhere

Post pics of your 20" oldschool bmx bikes | Vintage BMX Bicycles

1983 Puch Trak Pro. Made in Wayne, NJ by Speed Unlimited.

thecabe.com

This is birdz bike a '75. I see the sprockets on the bay but no rock ring. I must need to keep looking.

 

[The Spokemaster]

The Schwinn Scrambler | 1975 to 1988

Vintage Schwinn Scrambler were made from 1975 to 1988. This page shows images and text from old catalogs of this classic bicycle.

bikehistory.org

 

[bloo]

This is birdz bike a '75. I see the sprockets on the bay but no rock ring. I must need to keep looking.

That's what I saw in a scrambler ad in some CABE posting the other day. In @birdzgarage 's pics it is a lot more clear, and appears to be a sheet metal thing instead of a more serious bash guard. I cant imagine what else they would have used it on though. I just looked up the Varsity one and it appears to be the same bolt pattern, but it's way too big. Were there any 5 speed models without a conventional chain guard?

 

[birdzgarage]

It's an early 75 scrambler only part. In the later part of 75 the started putting regular guards on them.i never found one for the silver 75 I had. I bought my gold one and sold it to a friend.he hasn't found one yet.the rarest of the 70s stingray frames.my favorite but only in og paint,as it can't be faked without paint touch up.

 

[coasterbrakejunkie1969]

It's an early 75 scrambler only part. In the later part of 75 the started putting regular guards on them.i never found one for the silver 75 I had. I bought my gold one and sold it to a friend.he hasn't found one yet.the rarest of the 70s stingray frames.my favorite but only in og paint,as it can't be faked without paint touch up.

Is there a set pattern for the mounting holes on a rock ring, or does it depend on the sprocket? I see Scrambler sprockets with what seems to be the mounting holes for a ring. I wondered if I can use another type besides Schwinn.

 

[bloo]

I doubt these are standard. Someone needs to measure one. I think the Varsity would be the same, anyone know? You might even machine the teeth off of a Varsity outer chainring and come up with something that looks pretty close for a placeholder.

 

[birdzgarage]

It's a standard 39 tooth schwinn bmx sprocket.late 70s early 80s.im pretty sure they all have the holes.besides 10 speeds it's the only schwinn of the era without a regular guard.maybe it was an aftermarket sourced part.i looked for over a year.i have friends in pretty high places in the vintage bmx world and still found it easier to buy a bike that had one.most were pulled and tossed in the trash.