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I have a 1972 Schwinn Varsity. I have purchased new wheel rims. Both the front and rear rims are Sun Rims M13II model rims. I need to know what 5 speed freewheel will attach to the M13II rear rim hub? Would the original Schwinn (5 speed Shimano MF-Z012, 14-17-20-24-28) freewheel screw onto the M13II hub? I can't get the original freewheel off the the original wheel rim, but I would (or buy another one) if I know it will screw onto the new wheel rim.

Thanks! Nick

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Freewheel thread sizes are standardized to an ISO standard which is 1.375" x 24 tpi. See https://www.sheldonbrown.com/freewheels.html. That means any new freewheel you can buy will be compatible with your new rear wheel.

The original Schwinn freewheel might have a different thread (I'm sure others will correct me on this if I'm wrong), but if you are replacing the wheels it's a good idea to replace the freehub too.

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Freewheel thread sizes are standardized to an ISO standard which is 1.375" x 24 tpi. See https://www.sheldonbrown.com/freewheels.html. That means any new freewheel you can buy will be compatible with your new rear wheel.

The original Schwinn freewheel might have a different thread (I'm sure others will correct me on this if I'm wrong), but if you are replacing the wheels it's a good idea to replace the freehub too.

This is correct. Also which original schwinn freewheel? Like the gold plated skip-tooth ones!?

Also have sunm13ii wheelset on my fuji redlof folder I mirror finished and overhauled with almost all entry level to top suntour deraileurs, jagwire housing, sr, sugino, madae ind, sakae, dia compe, tektro/aztec, suzue hubs, kyt pedals, gp4000sii tires, marin saddle....

Anyhow i love my frankenbike. point was the instead of doing singlespeed i finished off the steed with my most silent and sturdy freewheel I ever had (i had em all) a 5 speed suntour "perfect" and the bike purrrrrs....

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