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What’s the difference between the cassette and freewheel?

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What’s the difference between the cassette and freewheel?

Old 05-03-21, 12:50 PM
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The Big Wheel
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What’s the difference between the cassette and freewheel?

What’s the difference between the cassette and freewheel?


I'm about to build an electric bike and the seller wants to know if my rear tire has a cassette or freewheel for the gears.


The bike in question is a Trek FX1.

https://www.trekbikes.com/us/en_US/b.../fx-1/p/32769/

Last edited by The Big Wheel; 05-03-21 at 12:54 PM.
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Old 05-03-21, 12:57 PM
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Iride01
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Design.

Freewheels are older tech that the cogs don't remove quite as easily. The mounting on the wheel hub is different. The axle bearings on the drive side are further away from the drop out and leave more chance for bending or breaking an axle.

Freewheel or Cassette?
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Old 05-03-21, 01:18 PM
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Originally Posted by The Big Wheel View Post
What’s the difference between the cassette and freewheel?


I'm about to build an electric bike and the seller wants to know if my rear tire has a cassette or freewheel for the gears.


The bike in question is a Trek FX1.

https://www.trekbikes.com/us/en_US/b.../fx-1/p/32769/
From the specifications listed in the link you provided:
" SunRace MFM300 freewheel, 14-34, 7 speed"
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Old 05-03-21, 01:51 PM
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Most simply:
Freewheel...older design, the 'clicky' part is in the freewheel gears themselves, screws onto a threaded hub.
Freehub/cassette...newer design, the 'clicky' part is in freehub which is part of the hub. The cassette slides onto splines on the freehub and is held on with a lockring.
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Old 05-03-21, 03:35 PM
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https://www.sheldonbrown.com/free-k7.html
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Old 05-04-21, 12:31 AM
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Freewheels contain the ratchet mechanism, while cassettes are just the sprocket cluster, with the ratchet being part of the hub. The cost of the extra parts miraculously makes freewheels cheaper than cassettes.

Last edited by gilesa; 05-04-21 at 12:43 AM. Reason: prosody
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