A free e-bike service tracker for Bosch, Shimano and DJI e-MTBs

An e-bike service tracker counts the miles on the parts that wear out, and tells you when each is due. Your e-bike already counts the miles. Bosch and Shimano displays keep a lifetime total, and both can warn you when a service is due.

None of them knows when your pads are done.

Here's where each system keeps its total, what the dealer side covers, and how the free Plus1 Garage fills the gap. I built it, so the paid alternatives and their prices are here too.

Why e-bikes wear parts faster

Torque and weight, through the same chain, cassette and pads as any other bike.

Shimano's EP801 makes 85 Nm, according to MBR. Bosch lists its current Performance Line CX at up to 120 Nm (Bosch). DJI's Avinox M2S gives up to 130 Nm in its regular modes and 150 Nm in Boost (Avinox FAQ). BIKE magazine reports that Bosch saves its 120 Nm for torque peaks, partly to protect the drivetrain.

Even Bosch is careful with it.

Then the weight. Most of the Avinox M2S bikes E-MOUNTAINBIKE lists weigh 21.4 to 24.2 kg in the sizes it quotes. Every climb and every hard stop goes through the chain and the pads.

I ride a Mondraker Zendit with a DJI Avinox motor. Here's what that torque does:

"Avinox absolutely kills cassettes. I've been through a chain in 200 miles and a cassette in 700 miles. Bear that in mind, but it's a small price to pay for the smile on your face."

Park Tool says a chain run past its wear limit wears out the cogs and chainrings early, and a cassette costs far more to replace than a chain (Park Tool).

Change the chain on time and you save the cassette.

Where to find the odometer on Bosch, Shimano and DJI

Bosch and Shimano displays keep a trip figure and a total. Type in the total. The trip resets, sometimes on its own.

System	Where the total is	Service reminder
Bosch smart system, Kiox 300	Trip screen, second level: TOTAL TRIP	Settings > My eBike > Service, if your dealer set a date
Bosch smart system, Purion 200	The statistics screens (the manual doesn't name a total), or the eBike Flow app	Settings > eBike > Service, if a service centre set a date
Bosch eBike Flow app	Shows the distance travelled	Shows your next service appointment
Shimano, SC-EM800 display	ODO, the cumulative distance (DST is the trip)	A maintenance alert icon
DJI Avinox	Not stated in DJI's FAQ; look in the Avinox Ride app	DJI's FAQ describes fault alerts, not service dates

The Bosch rows come from its Kiox 300 and Purion 200 manuals, and Shimano's from its SC-EM800 manual. Bosch warns that software updates can change what its screens show. If a menu has moved, check the app.

DJI is less clear. Its FAQ says riding records are stored on the display, by logged-in account, but not where a lifetime total lives. Look in the Avinox Ride app, or ask your dealer at the next service. My Avinox maintenance guide covers the rest.

What the dealer tracks, and what it doesn't

Bosch says to have your eBike system checked by an expert at least once a year, including the mechanical parts and the software. Your dealer can set the next service date by distance, time or both. Once it's due, the display tells you each time you switch on. Shimano's maintenance alert icon means maintenance is required: contact your shop.

That covers the drive system. It doesn't cover the parts that wear out fastest.

Bosch's free eBike Flow app shows the distance travelled and your next service appointment. Its paid Flow+ tier is £3.99 a month or £34.99 a year on the UK App Store (checked 18 October 2026). The listing sells security, like the premium eBike Alarm with GPS tracking. It doesn't describe tracking wear on individual parts.

None of it counts your chain.

What to track on an e-MTB

These are the Garage's starting estimates for a full-power e-bike, in UK mixed conditions on drip lube. You can change any of them.

• Chain: 540 miles, against 900 on a normal bike. The bar turns amber at halfway, your cue to start using a chain checker.
• Cassette: 1,620 miles. Mine went at 700.
• Brake pads: about 430 miles front, 350 rear.
• Tyres: about 600 miles front, 310 rear.
• Fork and shock: it follows the maker of the fork and shock you pick. A FOX fork or air shock gets FOX's full service, every 850 miles or 12 months, with the lower legs or air can included. A current RockShox fork gets a lower leg service every 340 miles or six months, and a damper and spring service every 1,360 miles or 12 months. A fork or shock it doesn't know starts at 340 miles for the lowers or air can, and 850 miles or 12 months for the full service. My suspension guide has what FOX and RockShox say in hours.
• Drive system: a dealer service every 1,850 miles or 12 months, a firmware check every six months and a yearly battery health check.

Ride mostly in the wet and the numbers shrink again: an e-bike chain on drip lube starts at about 300 miles. Lightweight motors, like Bosch's Performance Line SX, get half the e-bike penalty. The full list is in my e-MTB maintenance schedule.

My own chain lasted 200 miles. They're starting points.

How the Garage handles an e-bike

1. Pick your bike. 224 of the 905 bikes in its list are e-bikes, with the motor, fork, shock, groupset and brakes filled in. Or add your own.
2. Type in the odometer. When you add an e-bike, the Garage says where your motor keeps its total, where it knows. Update it now and then.
3. It does the e-bike maths. Drivetrain parts get 60% of a normal bike's life, brakes 70%, the front tyre 55%, the rear 50%, the fork and shock 85% and pivot checks 80%.
4. Every part gets a bar: fine, coming up or due. A part counted in miles updates when you type in a new reading. A part with a date, like the yearly dealer service, gets a reminder on the day, one notification per bike per day at most.
5. Correct it. Tap "Doesn't need replacing yet", or set where a part is in its life.

Free and paid e-bike trackers compared

UK App Store prices, checked 18 October 2026. Android prices can differ.

App	Free version	Paid version (UK)	E-bikes	Miles come from
Plus1 Garage	All of it, any number of bikes	None	224 e-bikes listed, e-bike wear factors	You type them in
Bosch eBike Flow	Navigation, activity tracking, eBike Lock, service date	Flow+ £3.99 a month or £34.99 a year	Bosch smart system only	Your Bosch bike
PedalCare	Up to 2 bikes	Pro £2.99 a month or £29.99 a year	E-bike and e-MTB profiles	Strava, Garmin Connect, Apple Watch
BikeCare	1 bike	Pro £2.99 a month or £24.99 a year	Intervals adapt to Bosch, Shimano and Brose motors	Strava
Cogbook (iPhone)	Service log and your bikes	Pro £3.99 a month, £19.99 a year or £39.99 lifetime	Complete e-bike support is Pro only	By hand, or Apple Health
ProBikeGarage	Free to start on Google Play and the web	£3.99 on the UK App Store; Premium £2.99 a month or £24.99 a year	Not mentioned	Strava

PedalCare and BikeCare pull your rides in automatically. The Garage doesn't, and that's a fair point in their favour.

You may not need to pay anyone. Strava tracks the distance on each bike for free, though its help pages describe mileage alerts for shoes, not bike parts. Garmin Connect tracks bike components for free, and its June 2026 update added alerts on Edge bike computers when a part nears the end of its life. Every app is compared in my bike maintenance app guide.

Why I think the Garage is the best fit for an e-MTB

I built it, so this is my opinion, with reasons.

• It's completely free. No subscription, no paid tier, no ads, no limit on bikes.
• The e-bike side is free too. You don't pay for e-bike support or a second bike.
• It's built for wet UK riding. I ride the Forest of Dean, where some of the clay turns to ice in the wet. Tell it you ride mostly in the wet and the drivetrain and pads get shorter lives.
• Rides and riders are in the same app. Find someone to ride with on Saturday, then check your pads.

Its limits are real. You type in the miles, every number is a best guess, and it can't see your chain. More is coming. Today it does the counting and the remembering.

The Garage is a tab in the Plus1 app. Add your e-bike, type in the total, and see what's due.