e-Mountain bike technologies are moving at an alarming rate. Newton metres and power figures are constantly rising, making e-MTBs more capable and, to some, more fun to ride. However, there’s one key downside – range. Even with the largest batteries, range is limited, but that’s where French brand TDM steps in with its new CNPR drive system, which features super exciting energy recovery tech to bring up to 100km of riding on a single charge.

CNPR can top up your battery as you brake

Being honest, e-mountain bike systems do offer quite a decent range, generally. With an 800Wh battery, it’s easy to knock out 1,000+ metres of ascent, all while putting minimal effort into the climbs. That means great things for those who prefer life on the downhills. However, a battery’s capacity is a finite resource that needs managing, no matter how you look at it, and range anxiety can be a real downer, even on the best of rides.

However, Technologies de Merde (or TDM for short) is a fresh brand to the market that promises to relieve dreaded range anxiety by introducing a system that’s not too dissimilar from KERS, a kinetic energy recovery system that was used in Formula One some years ago. Coming as part of its new CNPR drive unit, the SRB (System de Regeneration de Battery) system leverages forces caused by the brakes under braking loads to recover energy and recharge the bike’s 600Wh battery. As a result, the brand reckons that a rider can wring 100km of riding out of the battery, as long as they’re braking an ‘average’ amount.

Of course, not every brake system is capable of achieving this, but TDM has taken advantage of an as-yet-unknown ABS brake. Not only does this grace a bike with cool ABS technologies, but it gathers up excess energy through friction and heat, topping up the battery as you brake… so you need to go slower to go further?

When asking the people behind the brand, they say that this technology doesn’t apply just to e-bikes, and that they’re working on bringing similar tech to electronic drivetrain components, and that there’s scope to add charging ports onto regular bikes of all kinds. That could mean great things to regular-bike-purist bikepackers and those who hate charging things.

We’ve also been told that, as there’s merely a bunch of cables added to the motor, overall system weights won’t be horrendously greater than what we’ve become accustomed to.

There’s plenty of power under the hood

While the whole SRB system is very exciting for the world of e-bikes, the CNPR system is nothing short of modern; it even pushes the envelope a little bit… Hans Rey won’t be happy.

This system can knock out up to 150Nm of torque and 1,400W at peak power. That peak power measurement is only available as part of the motor’s boost mode, which can only be activated in three-second bursts – handy for tricky technical climbs. There are then three batteries available, one 100Wh for those looking for minimal weight, one 450Wh, which we expect to see on most lighterweight e-bikes, as there’s the energy regen system at play, as well as an 800Wh battery.

As the SRB capability of the motor can rustle up extra range, there are no plans to introduce a range extender.

For more details, head over to TMD’s website.

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