E-Bike Parts

Freewheels

Thread-on freewheels common on hub-motor e-bikes (often 7-speed).

Most hub-motor e-bikes use a thread-on freewheel rather than a cassette. It screws onto the motor's threaded shell, usually with a 7-speed cluster, and it does two jobs: it carries the cogs and it contains the ratchet that lets you coast. When a freewheel wears or the ratchet gets gritty, you get skipping, a grinding sound when coasting, or pedals that do not catch immediately. Replacement is cheap and, with the right tool, a ten-minute job.

Identify it first: a freewheel has no separate lockring, and the entire cluster unthreads from the hub counterclockwise using a splined remover that fits inside the center. Removal tools differ between brands, so match the tool to the freewheel you are removing. Most hub motors use the standard freewheel thread, and 7-speed is the common size, with 14-28 or 14-34 tooth ranges on stock bikes and wider-range options (for example 11-32) sold as upgrades. Tooth counts are stamped on the cogs, so a quick look tells you what range you have now.

Width is the catch. Hub motors have limited space between the freewheel and the frame dropout, and an 8 or 9 speed freewheel is wider than a 7 and may not clear the chainstay or may shift the chainline. Stick with your current speed count unless the motor maker says otherwise. A new freewheel needs the same speed chain; confirm your speed count and thread type on your bike before ordering. If you also want easier pedaling at higher speeds, an 11-tooth small cog is the practical upgrade inside the 7-speed format; a motor-clearance check with the seller is still wise.

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FreewheelsFeatured

Shimano MF-TZ500 7-Speed Freewheel 14-28T

Most rear hub-motor e-bikes use a thread-on freewheel rather than a cassette, and the 7-speed Shimano MF-TZ500 (successor to the TZ-31) is the one that comes on a huge share of them. It screws onto the motor's threaded boss and comes off with a standard Shimano freewheel remover. The 14-28 range is conservative: fine for flat commuting and assisted riding, limiting if you want to pedal fast downhill. When the freewheel starts skipping or the pawls stick, replacing it is a cheap twenty-minute job if you have the tool.

Best for: 7-speed hub-motor e-bikes with a thread-on freewheel · Fixing a skipping or sticky freewheel · Like-for-like replacements

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Freewheels

DNP Epoch 7-Speed Freewheel 11-28T

The DNP Epoch is the upgrade freewheel for hub-motor e-bikes: an 11-tooth small cog instead of the usual 14, which gives you a usefully taller top gear so you can still pedal along at 20–28 mph rather than spinning out. It is a thread-on 7-speed unit with a nickel finish and is a direct swap for the Shimano TZ-series on most bikes. Shifting is a touch less refined than Shimano and the pawls can be noisy, but for riders who pedal along with the motor, the 11T is the main reason to buy it.

Best for: Class 2/3 e-bike riders who spin out in top gear · 7-speed thread-on hub-motor bikes · Upgrading a worn stock freewheel

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How to choose freewheels

Speed count

Match your chain and shifter; 7-speed is most common on hub motors. Count your cogs.

Tooth range

Stock is often 14-28 or 14-34; an 11-tooth small cog adds top-end pedaling speed, which is useful on faster e-bikes.

Thread standard

Nearly all hub motors use the standard freewheel thread, but confirm with your motor maker if the bike is unusual.

Width and clearance

Stay within your current width unless the motor maker confirms clearance for a wider freewheel.

Removal tool

Buy the splined remover that matches your freewheel brand; Shimano-style and DNP-style tools differ in spline size.

Compatibility notes

Confirm your bike uses a freewheel (no center lockring) and not a cassette before ordering.
Wider freewheels may hit the frame or shift the chainline on a hub motor; confirm clearance with the motor maker.
Removal tool spline patterns vary by brand; match the tool to the freewheel you have.

Installation considerations

Remove the wheel, fit the correct remover, and unthread counterclockwise; a freewheel that has been on for years may need a long wrench or vise.
Grease the hub threads lightly, thread the new freewheel on by hand, and let pedaling torque tighten it fully.
Check derailleur limit screws and indexing after the swap, especially if the tooth range changed.

Maintenance tips

Keep the freewheel clean and lightly lubricated; drip a little light oil into the gap between the body and the cogs occasionally.
Replace the chain on schedule so the cogs do not wear to a hook shape.
Grinding when coasting or a delay when you start pedaling usually means it is time for a new freewheel.

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Frequently asked questions

How do I know what freewheel to buy?

Count the cogs (usually 7 on hub-motor e-bikes), note the tooth range stamped on the largest and smallest cogs, and confirm it is a freewheel rather than a cassette. Replace with the same speed count.

Can I put an 8 or 9 speed freewheel on my hub motor?

Sometimes, but wider freewheels often do not clear the frame on hub motors. Check with the motor maker and expect to change the chain and shifter as well.

What tool removes a freewheel?

A splined freewheel remover that matches your brand's spline count, held in a vise or large wrench. Using the wrong tool rounds off the splines.

Why does my bike grind when coasting?

Dry or worn freewheel pawls. Oiling may quiet it for a while; replacement is the lasting fix and inexpensive.

Does a new freewheel need a new chain?

Not necessarily, but if the old chain is worn it will wear the new cogs fast. Check chain wear and replace both if the chain measures stretched.