Unusual parts found scavenging bikes.

[horsefarmer]

Tearing apart some junky bikes. Found this wierd 2 piece chainwheel on a Mexican built Roadmaster mtn. bike.

The small chainwheel might be cool for a klunker build...

 

[MattiThundrrr]

Oof! The middle ring! It's making my teeth hurt!

 

[horsefarmer]

Top cone on cheap Mtn. bike made super duper thick!

 

[horsefarmer]

IDK where I came by this wheel, but going thru the stash and thought the end of the cog looks wierd, like a speed is missing?

It's a "Slick shift system by DNP", I also thought I saw somewhere the rim is German? I also think it may have come from a Schwinn Frontier bike.

 

[Grant]

Top cone on cheap Mtn. bike made super duper thick!View attachment 109170 View attachment 109171

You see that on a lot of cheap, early 2000s MTBs and BMXs.

 

[Grant]

That freewheel is definitely broken. I googled it and they all looked like this. I am guessing the smallest cog broke in half because of cheap metal, old age, and hard use.

 

[horsefarmer]

Pulled a one piece 52t crank from an old Sears exercise bike...

 

[mikeeebikey]

Tearing apart some junky bikes. Found this wierd 2 piece chainwheel on a Mexican built Roadmaster mtn. bike.
View attachment 108901
The small chainwheel might be cool for a klunker build...

When running silly sized tires and gearing I have used the small ring bolted to a coaster sprocket to reach an acceptable ratio. The biggest coaster I find is 23 tooth...

 

[Retro Flutter]

Pulled a one piece 52t crank from an old Sears exercise bike...

View attachment 152990

View attachment 152994View attachment 152995

Modern high end MTBs have gone to a similar interface system. Kinda odd how old tech comes back around sometimes.