Description

7-Speed Freewheel for Rear Hub Motor – 1.375″ x 24 TPI Thread for eBike Conversion Kits

Name: 6 Speed Freewheel for E-Bike Conversion Kits
Brand: All4ebikes
SKU: 30

Threaded 7-speed freewheel, compatible with rear hub motors in eBike conversion kits with 135mm axle spacing. Thread standard 1.375″ x 24 TPI — universal for brushless hub motors with external thread. Steel construction, ~36mm width, compatible with Shimano 7-speed shifters.

7 Speed 1.375″ x 24 TPI 135mm Axle Steel Shimano 7sp ~36mm

The 7-speed freewheel is the standard drivetrain component for threaded rear hub motors in the All4eBikes range — all MTX kits use hubs with 1.375″ x 24 TPI external thread, the format that allows freewheel replacement without disassembling the motor. Unlike cassette systems (freehub with splines), the freewheel incorporates the ratcheting mechanism directly inside the sprocket block — a simple, robust and easy-to-replace unit.

7-Speed Freewheel Technical Specifications

Mechanical Parameters

Number of speeds7

Thread standard1.375″ x 24 TPI

Total width~36mm

Compatible axle135mm QR

MaterialSteel

Thread directionRight-hand (standard)

Compatibility

Hub motor typeThreaded freewheel

ShifterShimano 7-speed

Chain1/2″ x 3/32″

Rear derailleurShort / medium cage

Hub typeExternal thread

NOT compatible withCassette freehub

Compatible Kits

250W MTX KitCompatible

500W MTX KitCompatible

1000W MTX KitCompatible

1500W MTX KitCompatible

2000W MTX KitCompatible

3000W MTX KitCompatible

Freewheel vs Cassette — why it matters for hub motors

All rear hub motors in the All4eBikes conversion kit range use hubs with 1.375″ x 24 TPI external thread — the freewheel format. This is the universal standard for brushless hub motors, as it allows a more compact, structurally stronger motor design with no splined freehub body to add width or complexity. The cassette system (splined freehub body) is used by performance bikes with 8–12 speeds and is not compatible with standard hub motors.

Why 7 speeds and not more

Freewheels have a practical maximum width of ~36mm for 7 speeds on a 135mm axle. 8–9 speed freewheels exist but extend past the shoulder of the hub motor axle on most standard 135mm hubs, requiring additional spacers and special derailleur alignment. 7 speeds is the optimal balance between available gear range and direct compatibility with the 135mm standard hub axle.

Thread lubrication — a mandatory installation step

Every time you install a freewheel, apply a layer of grease or anti-seize compound to the external hub thread before fitting. Without lubrication, every pedal stroke tightens the freewheel further onto the hub, and after years of use it becomes impossible to remove without destroying the component. This is by far the most common reason why old freewheels become permanently stuck on hub motors.

Important: check whether your hub motor has external thread (freewheel) or splines (freehub/cassette) before ordering. The two systems are not interchangeable. All MTX All4eBikes kits use 1.375″ x 24 TPI external thread — directly compatible with this product.

What It's Recommended For

Worn Sprocket Replacement

A direct replacement for the worn freewheel on any threaded rear hub motor from the conversion kit range.

Drivetrain Upgrade

Upgrade from 5–6 speeds to 7 speeds on a rear hub motor bike — wider gear range, more comfortable pedalling on climbs and at higher speeds.

Custom DIY Builds

An essential component for any DIY eBike build with a threaded rear hub motor — compatible with all MTX 250W–3000W kits in our range.

Installation and Maintenance

Installation Steps

Remove the wheel from the frame and disconnect the motor cable
Use a freewheel removal tool (Park Tool FR-1 or equivalent) to unscrew the old sprocket
Clean and degrease the external thread on the hub
Apply grease or anti-seize compound to the thread
Thread the new 7-speed freewheel on by hand until it stops — pedalling will self-tighten it
Adjust the rear derailleur for the new gear range

Maintenance

Lube the chain regularly to reduce sprocket wear
Check sprocket wear every 1000–1500 km
Replace the chain before it stretches fully — a worn chain destroys sprockets quickly
Always apply grease to the thread when removing, ready for the next installation

Frequently Asked Questions About the 7-Speed Freewheel

How do I know if my hub motor has a threaded freewheel or a cassette freehub?

Look at the right side of the motor (the sprocket side). If the sprockets form a block that unscrews clockwise off the hub — it's a freewheel. If the sprockets are a separate block that slides onto a splined body and locks with a threaded ring — it's a cassette freehub. All MTX All4eBikes kits have 1.375″ x 24 TPI freewheel thread.

Is it compatible with existing Shimano 7-speed shifters?

Yes — the 7-speed freewheel is directly compatible with any Shimano 7-speed shifter (Tourney, Altus, Acera, Alivio etc.) and 7-speed brake levers. Shifters for 8 or more speeds are not compatible with 7-speed freewheels.

Can I fit an 8-speed freewheel on a hub motor with a 135mm axle?

Technically yes, but an 8-speed freewheel (~40mm wide) extends past the axle shoulder on most standard 135mm hub motors, requiring additional spacers and possibly a new derailleur. In practice, 7 speeds is the recommended maximum for standard 135mm hub motor axles.

How long does a freewheel last on an e-bike?

Lifespan depends on maintenance and terrain. On an e-bike with motor assistance, sprockets typically outlast the chain (which wears faster due to the added motor torque). General rule: replace the chain every 2000–3000 km and check sprocket wear at the same interval — an untreated worn chain will quickly destroy the sprocket block.