The best pedal spanner is the one that fits your pedals and gives your hand enough room beside the crank. Many MTB pedals use 15mm flats, but others need a 6mm or 8mm hex key from the inside of the crank. Check that fitting before buying: a longer handle cannot make the wrong tool work.
ELECTRIC MTB UK THE SHORTLIST
Best pedal spanners: the shortlist
Choose a slim 15mm spanner for axle flats or the matching 6mm or 8mm hex tool for an internal fitting.
For a home workshop with several bikes, the Park Tool PW-4 is our overall choice for 15mm flats. The BBB DualForce is the better fit for hex-only axles, while DMR combines both types. For most riders, the useful upgrade is a comfortable handle and enough clearance to work safely beside the crank.
The alternatives below run from the lowest item price upwards. Delivery can change the value of a small tool order, especially when buying through a marketplace seller.
The best pedal spanners and wrenches in detail
Park Tool PW-4 Professional Pedal Wrench
Our workshop pick for pedals with 15mm flats: two jaw angles and a long, rounded handle make awkward crank positions easier to deal with.
+ Pros
- Two jaw angles improve positioning
- Long handle offers useful leverage
- Rounded vinyl grip
− Cons
- No 6mm or 8mm hex fitting
- More expensive than occasional-use tools
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PW-4, 15mm
Prices and availability may change. Prices last checked: 2026-10-29 12:00 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
Buy the PW-4 if pedal swaps are a regular workshop job. Its 30- and 45-degree openings give more options around the crank, while the long handle reduces the effort needed. It is excessive for a travel pouch and cannot remove hex-only pedals.
Key specifications
- Fitting
- 15mm pedal flats
- Jaw angles
- 30 and 45 degrees
- Overall length
- 395mm
- Handle
- 14in, vinyl dipped
- Claimed weight
- 617g
Decathlon Pedal Wrench
A straightforward budget spanner for occasional pedal swaps, provided your axle has accessible 15mm flats.
+ Pros
- Low purchase price
- Simple dedicated 15mm fitting
- Corrosion-resistant coating
− Cons
- No hex socket tools
- Less versatile than combination options
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Decathlon 8938257, 15mm, no size
Prices and availability may change. Prices last checked: 2026-10-29 12:01 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
This is the sensible starting point if you only remove pedals for packing or an occasional replacement. Spend more for extra leverage or different jaw positions, not because an electric motor demands a special pedal tool.
Key specifications
- Fitting
- 15mm pedal flats
- Model
- 8938257
- Finish
- Corrosion-resistant coating
BBB DualForce Pedal Wrench
The useful exception to the spanner shortlist: a long 6mm and 8mm hex wrench for pedals without external flats.
At Tredz
DualForce, 6mm and 8mm hex
+ Pros
- Both common pedal hex sizes
- 33cm length gives leverage
- Complements a 15mm spanner
− Cons
- Cannot grip external flats
- Long leverage needs care when tightening
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DualForce, 6mm and 8mm hex
Prices and availability may change. Prices last checked: 2026-10-29 12:01 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
Choose this for an axle accessed from the back of the crank. The two hex sizes cover many MTB pedals, but check your own fitting first. Keep the bit fully seated and follow the pedal maker’s tightening specification.
Key specifications
- Fittings
- 6mm and 8mm hex
- Length
- 33cm
- Format
- Double-ended wrench
BBB Hi-Torque L Pedal Wrench
A keenly priced long-handled spanner for riders who want more reach without paying for a premium workshop tool.
At Tredz
Hi-Torque L, 15mm pedal wrench
+ Pros
- Long 33cm handle
- Double-sided head
- Good value for a home workshop
− Cons
- No hex fitting
- Bulky for carrying on rides
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Hi-Torque L, 15mm pedal wrench
Prices and availability may change. Prices last checked: 2026-10-29 12:01 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
The Hi-Torque L makes sense beside a set of hex keys in a home toolkit. Its long format gives room to work around the crank, although clearance still depends on the pedal and crank shape. A dedicated workshop purchase rather than a trailside essential.
Key specifications
- Fitting
- 15mm pedal flats
- Length
- 33cm
- Head
- Double sided
Oxford Torque Pedal Spanner
A basic 15mm pedal tool for occasional home use, available through Decathlon’s marketplace.
At Decathlon – Alison’s Biciclette
Oxford Torque Pedal Spanner, 15mm
+ Pros
- Dedicated 15mm fitting
- Affordable home-tool option
− Cons
- No torque measurement despite the name
- Marketplace delivery and returns apply
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Oxford Torque Pedal Spanner, 15mm
Prices and availability may change. Prices last checked: 2026-10-29 12:02 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
Consider the Oxford if you want a simple pedal spanner and its delivered price suits your order. Torque is the range name: this is not a calibrated torque wrench. The BBB offers a clearly specified 33cm length for similar money.
Key specifications
- Fitting
- 15mm pedal flats
- Type
- Manual pedal spanner
- Seller
- Alison’s Biciclette via Decathlon
Park Tool PW-5 Home Mechanic Pedal Wrench
A compact alternative to the PW-4 for regular home maintenance without the larger workshop handle.
At Tredz
PW-5, black/blue, 15mm
+ Pros
- 29cm length suits a toolbox
- Heat-treated spring steel
- Vinyl-covered handle
− Cons
- Less leverage than the PW-4
- No hex fittings
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PW-5, black/blue, 15mm
Prices and availability may change. Prices last checked: 2026-10-29 12:02 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
The PW-5 is the more proportionate Park purchase for one or two bikes. It saves money and toolbox space while retaining a dedicated pedal head. Choose the PW-4 if stubborn fittings and frequent use justify the longer handle.
Key specifications
- Fitting
- 15mm pedal flats
- Length
- 29cm
- Material
- Heat-treated spring steel
- Grip
- Vinyl dipped
Topeak Pedal Wrench 15mm
An offset head and padded handle make this a practical middle-ground choice for a home workbench.
At Leisure Lakes Bikes
TPS-SP20, 15mm
+ Pros
- Offset helps hand clearance
- Padded handle
- Manageable 29cm length
− Cons
- No hex fitting
- Shorter than the longest workshop options
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TPS-SP20, 15mm
Prices and availability may change. Prices last checked: 2026-10-29 12:02 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
The Topeak’s offset is useful when a straight spanner puts your knuckles close to the crank. It is an appealing compromise between a basic flat tool and a large workshop wrench, although it still needs accessible 15mm axle flats.
Key specifications
- Fitting
- 15mm
- Dimensions
- 29 × 3.8 × 2cm
- Claimed weight
- 260g
- Tool material
- Hardened steel
DMR Pedal Spanner
A sturdy 15mm spanner with a hex fitting and a grippy handle, useful when pedal swaps are a regular job.
At Leisure Lakes Bikes
DMR-TOOL-PEDAL-BLK, black
+ Pros
- 15mm pedal-flats fitting
- Laser-cut head
- Integrated bottle opener
− Cons
- Costs more than a basic spanner
- No torque measurement
- Check included hex sizes before ordering
Compare prices
DMR-TOOL-PEDAL-BLK, black
Prices and availability may change. Prices last checked: 2026-10-29 12:02 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
The DMR suits riders who want a substantial pedal spanner with a comfortable grip. Its 15mm head covers conventional axle flats, and DMR lists a 6mm hex fitting for the black version. Retailer descriptions also mention 8mm, so confirm what is included before buying for an 8mm-only axle. The BBB DualForce is the clearer choice when you specifically need both hex sizes.
Key specifications
- Main fitting
- 15mm pedal flats
- Hex fitting
- 6mm listed by DMR; confirm 8mm provision with retailer
- Head
- Laser-cut chromoly
- Model
- DMR-TOOL-PEDAL-BLK
Choose the fitting before the handle
Look at the axle on both sides of the crank. External flats take a slim 15mm pedal spanner; a recessed hex socket takes the matching hex tool. Some pedals offer both. An ordinary open-ended spanner can be too thick for the available gap, and an adjustable wrench is a poor substitute if it cannot sit squarely on the flats.
If you are replacing the pedals themselves, our MTB pedals guide compares flat and clipless options. Pairing them with suitable MTB shoes matters more on the trail than the brand printed on the workshop tool.
What makes a good pedal spanner?
A long handle is useful when removing a tight pedal, but it also makes overtightening easier. Start clean, lubricated threads by hand and follow the pedal and crank manufacturers’ instructions. Use a compatible torque tool for final tightening where specified; our torque-wrench guide explains the options. Check its range reaches the required setting.
A thin head must still engage the full width of the axle flats. Angled jaws offer another starting position when the crank blocks a straight pull, while an offset head can keep knuckles further from the bike. These details matter more than buying the longest tool available.
Keep the tool fully engaged and your hand clear of the chainring. If a pedal remains stuck, stop before rounding the fitting or damaging the crank. A workshop can assess corrosion, cross-threading and damaged flats more safely than simply adding a longer lever.
Pedal spanner FAQs
Do eMTBs need a special pedal spanner?
No. The pedal fitting determines the tool. Switch the assistance off and support the bike securely before working; there is no reason to power the motor during a pedal change.
Which way does the left pedal undo?
Viewed from outside the bike on the left side, the left pedal loosens clockwise. The right pedal loosens anticlockwise when viewed from outside on the right. Looking through a hex socket from the back of the crank reverses your viewpoint, so take a moment to identify the correct direction.
Can I use a multi-tool?
A correctly sized hex key on a bike multi-tool may fit, but its short handle and limited clearance can make removal awkward. A proper workshop wrench is easier to control for repeated swaps.
Is a pedal spanner a torque wrench?
No. A normal pedal spanner applies force without measuring it. Oxford’s Torque model is still a conventional spanner. Never assume the tool’s name supplies a tightening setting.
Our verdict
Buy the PW-4 for frequent work on 15mm flats, the Decathlon wrench for occasional budget use, or the DualForce for hex-only pedals. The DMR adds a grippy handle and a hex fitting, but confirm its supplied hex sizes before buying for an 8mm-only pedal.