Mobile bottom bracket replacement · from £15.00

Bike bottom bracket replacement in London, at your door.

The bottom bracket is the bearing the cranks turn on. When it wears, the bike creaks under load and the cranks develop side-to-side play. A mechanic replaces a worn square taper bottom bracket where the bike stands for £15.00 labour, with the new unit priced before it is fitted.

Covering every London borough - see where we ride.

from £15

Labour, any bike

~30 min

Booked slot

Same day

Subject to availability

A Tyred mechanic servicing the wheel of a cargo bike on a London pavement.
Prices

Bottom bracket replacement price

One labour price for standard bikes, e-bikes and cargo bikes. The bottom bracket itself is priced before it is fitted.

  • Bottom bracket replacement

    30 min slot
    Standard bike
    £15.00
    E-bike
    £15.00
    Cargo bike
    £15.00

    Worn square taper bottom brackets replaced.

The listed job is for a square taper bottom bracket, the sealed cartridge fitted to commuter, hybrid, Dutch and many children's bikes. For other standards, describe the bike when you book and the mechanic confirms the job and price before any work starts.

A part we do not carry is priced before it is fitted, so you approve the cost first.

Individual repairs can be booked for the same day, subject to availability, seven days a week across all 33 London boroughs.

A distance-based call-out fee can apply. It is free under 3 km from your nearest Tyred base and on orders of £150.00 or more, and it is shown before you pay.

Every repair and service price, listed by bike type, is on our prices page.

What is included

What a bottom bracket replacement includes

The cranks come off, the old unit comes out, the new one goes in and the cranks go back on at the right torque.

  • Creak traced to the bottom bracket before anything is removed
  • Cranks and pedals removed
  • Old bottom bracket removed and the shell threads cleaned and greased
  • New bottom bracket fitted and torqued
  • Cranks refitted and the chainline and chain checked
  • Pedals refitted and the bike test ridden

Not included

  • The bottom bracket unit itself, priced before it is fitted. Tell us the bike model and the mechanic brings or sources the right size.
  • New cranks, chainrings or pedals, priced before they are fitted.
  • Frame repairs. A cracked or damaged bottom bracket shell is inspected but not repaired.
When to book

Signs the bottom bracket is worn

Creaks travel through a bike frame, so the noise alone is not proof. These are the signs that point to the bottom bracket.

  • Creaking under load

    A creak or click once per pedal stroke, loudest when climbing or pushing off from the lights, that stays whether you are seated or standing.

  • Play at the cranks

    Hold a crank arm and push it sideways. Movement you can feel at the crank, with the pedal still, means the bearing is gone.

  • Rough rotation

    With the chain off the chainring, spin the cranks by hand. A gritty, notchy or stiff turn is worn bearings.

  • Grinding or rumbling

    A low rumble that rises with pedalling speed and disappears when you coast.

  • Water has been inside

    A bike that has lived outside, been ridden through standing water or been jet washed is a candidate. Rust on the spindle confirms it.

  • The creak is something else

    Pedals, chainring bolts, the seatpost and a loose crank bolt all creak in time with pedalling. The mechanic checks these first and tells you what they find.

A Tyred mechanic in a branded jacket repairing a bike's rear wheel beside the mobile service trailer in London.
Your mechanic

Replaced where the bike stands

Priced before you book, tested before we leave.

Tyred mechanics travel to you by cargo bike with tools and common parts on board, including the crank extractor and bottom bracket tools the job needs, so the work happens at your home or workplace rather than in a workshop queue.

Each job is priced before you book and tested before the bike is handed back. The bottom bracket unit is matched to the shell width and spindle length of your bike and priced before it is fitted, so you approve the cost first.

How it works

Booked to fixed in four steps

Describe the problem, pick a slot and the mechanic comes to you.

1

Create your account

Sign up in under a minute and add your bike details.

2

Tell us about the bike

The make and model, and what the noise does, so the mechanic arrives with the right tools and the right size of bottom bracket.

3

Book a time slot

Pick a slot that suits you, with same day slots subject to availability, seven days a week.

4

We come to you

The mechanic confirms the diagnosis, fits the new bottom bracket, refits the cranks and test rides the bike.

FAQ

Frequently asked questions

Related

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Get started

Ready to pedal in silence?

Book a bottom bracket replacement and a mechanic comes to you.