Mid drive conversions

Is a mid mount motor the right choice for you?

How does it work?

The old bottom bracket is removed, and replaced with the motor unit and new cranks & chainring. A speed sensor is added to the back wheel, battery on the downtube and display on the bars.

Drive

The USP of the mid drive system is that it uses your existing drivetrain, so the additional power is made more effective by virtue of using your gears. A cadence sensor detects how fast you're pedalling and intelligently adds power so that the riding feels completely natural.

Battery

Batteries on mid mount motors tend to be larger than those on smaller hub motor kits. These offer greater capacities and more range.

Control

You control the level of assistance you require from a control unit on the handlebars, and can choose between 5 or 9 ascending power settings - all completely customisable. The displays can have a huge range of functionality and options.

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Pros and Cons

Mid drive vs hub motor conversions

Advantages

The weight of the motor is low and central, leading to better handling and making the bike easier to carry.
Using the existing transmission means that any given power rating offers better acceleration and a higher top speed.
Mid mount motors usually produce more torque.
Higher power ratings are possible (although 250W is the legal limit for use on UK roads).
Larger batteries give longer range.
More 'natural' riding experience.

Disadvantages

Mid drive kits are usually more expensive.
Installation is more complex and time consuming, needing special tools, parts & experience.
Larger batteries are heavy and can add more weight to the conversion.

Is a mid drive conversion right for you?

If your riding frequently includes hills or longer distances, or you want greater performance or customisation than that offered by a hub motor system, then yes!

Our mid drive options

We use Bafang motors for our mid drive conversions as we feel they offer the best balance of performance, functionality, reliability, customisation and parts availability. Bafang are generally considered to be the market leader when it comes to producing motor systems for ebike conversions (if you're interested, Google reviews of their BBS01 and BBS02 models).

The Commuter

The Bafang BBS01B 250W (80Nm) motor, combined with a 36V 13Ah (470Wh) battery, DZ40 display and choice of 44/46/48T chainring.

Motor

The BBS01B 250W motor is a tried and tested industry staple. Super quiet in operation, it effortlessly drives you up hills and accelerates you away from junctions. Utterly reliable and will do up to 10,000 miles before it needs servicing (which is just adding grease!).

Battery

The 36V 13Ah unit provides enough juice to commute on all week, should you so choose. Lockable onto the bike, or removable in seconds, the battery also comes with an onboard charge meter, and a USB out to turn it into a massive power bank.

Price & Upgrades

£845 fully installed with 12 months warranty.

  • 36V 350W motor: + £30
  • 17.4Ah (630Wh) battery: + £30
  • 20Ah (720Wh) battery: + £55
  • Gearshift sensor (highly recommended): + £25
  • P860ML display (see image below): + £30
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Electrify me!

How does Bafang compare to LVBU?

Besides the choice about whether to go for a hub or mid drive conversion, it's also worth being aware of the differences in manufacturer. It's not unlike choosing to buy a car, where you might consider the merits and design ethos of any given brand. Taking this analogy further, Bafang can be likened to BMW or Mercedes - a player in the industry for a long time, with proven products, a wide support network and a strong reputation for quality. LVBU are more like Tesla - a relatively new kid on the block, but with an innovative way of doing things and some cutting edge technology.

We've chosen to fit these two particular brands because we believe they're the best available, but if you're comparing between them - then Bafang are probably superior in aftermarket parts availability, degree of customisation (swapping out or upgrading components such as batteries, sensors, throttles or displays) and have been proven to run to huge mileages without any reliability concerns.

LVBU have been running for over 10 years (which is a long time in the ebike world), and have proved exceptional reliability and customer service over that time, as well as product development and support. The system is by its nature more integrated and less modular, although batteries and motors are still interchangeable.

Both manufacturers offer a 12 month warranty and have extremely responsive customer service so we have no hesitation at all in recommending either brand.

The question of reliability is raised here, because if you know anyone who's bought an ebike for under £1000, or a conversion kit for under £500 - does their bike still work? The chances are it doesn't - and with these cheap setups there's usually no customer service, parts supply or ability to repair the bikes in question. Even expensive factory ebikes from well known brands can have problems, and that can often lead to bikes being laid up for weeks or months waiting for parts. Not the case with our suppliers, in the extremely rare scenario that a warranty claim comes up!

If you decide that you'd like a Bafang system, but need a hub motor - this is also something that we can supply. Bafang make fantastic hub motors, at a similar price to their mid mount offerings.

One final note - stock availability. Bafang have huge stocks in the UK at any one time which means kits will usually arrive 2 days after ordering and conversions can be completed same week. LVBU have less stock in the UK, which means while some orders can arrive equally quickly, others may take 6-8 weeks to ship from China. Just drop us a line to find out what's currently in stock if you're interested!

The Beast

The Bafang BBS02B 750W (160Nm) motor, combined with a 48V 17.5Ah (840Wh) battery, DM03 display and choice of 44/46/48T chainring. This kit is only suitable for use on private land (with land-owner's permission). See the section describing current UK regulations below.

Motor

The BBS02B 750W motor is the gold standard when it comes to mid drive installations. Relentless power means even the steepest of off-road hills can be monstered on the throttle alone. With our custom map, it's also completely reliable and there's no need to worry about overheating the controller.

Battery

The 48V 17.5Ah unit is built using LG/Samsung cells - providing greater reliability, long life and safety. The huge 840Wh capacity means you can use all of that extra power, more of the time. Lockable onto the bike, or removable in seconds, the battery also comes with an onboard charge meter, and a USB out to turn it into a massive power bank.

Price & Upgrades

£995 fully installed with 12 months warranty.

  • New chain (highly recommended): + £15-25
  • Gearshift sensor (highly recommended): + £25
  • P860ML display: + £30
  • 20Ah (960Wh) battery: + £25
  • AirTag GPS tracker: + £30
  • BBSHD 1000W motor: + £220
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What are the current UK regulations on using an ebike conversion on the public road?

An EAPC (electrically assisted pedal cycle) must have pedals that can be used to propel it.

It must show either:

  • the power output
  • the manufacturer of the motor

It must also show either:

  • the battery’s voltage
  • the maximum speed of the bike

Its electric motor:

  • must have a maximum power output of 250 watts
  • should not be able to propel the bike when it’s travelling more than 15.5mph

Converted electric bikes may be fitted with a throttle, however if the throttle can propel the bike at speeds in excess of 6km/h, then it is subject to type approval requirements.

For clarity, the following conversions meet all requirements and are classed as a normal pedal bike for use on public roads in the UK:

  • The Swytch-Buster (front hub conversion)
  • The Rangemaster (front hub conversion)
  • The Commuter (mid drive conversion)

The following conversions do not meet these requirements and are intended for off-road use and designed to travel on unpaved surfaces (i.e. only on private land, subject to land-owner's permission):

  • The Beast (mid drive conversion)
  • The Legend (mid drive conversion)

Want to see how a mid drive conversion works?

This film covers everything you could want to know on the subject... from which bikes can be converted, to what's involved in a conversion, a comparison of mid-mount vs hub motor options, a tour of a converted eBike, and the reasons why they outperform factory eBikes costing many times more.

Any questions?

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We love a nerdy (no obligation!) chat about ebike specifications and upgrades, so if there's something you'd like to discuss, drop us an email or give us a call.

We are:

London eBike Conversions
83 Anson Road
Willesden Green
London
NW2 4AB

email: hello 'at' ebikeconversionslondon.co.uk
(we'd give you a nice link to click on but then
the spam trawlers would bury your delightful
missive amongst a million viagra ads)

tel: 020 8452 5474
mob: 07813 829428

Note: visits are by appointment only. Call or message on WhatsApp (number above).