Article The new Performance CX Race, for ebike racing

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knut7

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The new Bosch Performance CX Race is a limited edition motor. Only a few consumer ebike models will get it. The motor is developed for the ebike racers. It’s been that way for long in other bike sports, or even for cars. A lot of the development happens in the racing teams. The the upgrades reach the consumer market a while later. Check out Rob’s video, or keep reading below for a few highlights.









Same power, but for longer



The new Performance CX Race has the same 85Nm torque as the Performance CX. But it amplifies the rider input more, up from 340 to 400%. And the weight is reduced from about 2.9 to 2.75 kg.



2023-Bosch-Performance-CX-Race-02.jpeg




The Performance CX Race is still a legal motor with 250W nominal power and the 25km/h cut-off speed. But Bosch have maximized the time we get full motor power. When racing, there is no time to wait for the motor to activate carefully and smoothly...
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Continue reading...


 
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Rob Rides EMTB said:
It’s in a different league in the way it works.
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You mean Brose? ;)
Seriously; i have had Bosch(not race version) and it's a good motor. But i prefer Brose with Specialized much better motor. In the way that it works and because the brutal(but well controlled)power.
 
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Does this mean we can hit the limiter in two cranks instead of three & so spend more time with our rattle?
 
brilleaux said:
You mean Brose? ;)
Seriously; i have had Bosch(not race version) and it's a good motor. But i prefer Brose with Specialized much better motor. In the way that it works and because the brutal(but well controlled)power.
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I have both, and the Bosch is so much better on the climbs. Brose takes about 1/4 or a crank rotation to supply good power for super steep stuff . Bosch is instant.
 
RustyMTB said:
Does this mean we can hit the limiter in two cranks instead of three & so spend more time with our rattle?
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Can you hit the limit on the steepest inclines? Rock slabs that you’ve never even considered before because of the gradient? This is what the motor is made for. Not really for cruising flats and hitting the limiter 😂
 
Remember a couple of years back when a " natural" feel was desirable? Now we're pretending these partial pedal strokes with over run make it a racing pedant electric bike ?

Just fit a " race" lever up on the bars iand call it something like, er, a throttle ?
 
Pdoz said:
Just fit a " race" lever up on the bars iand call it something like, er, a throttle ?
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Old hat mate, buy yourself a Bafang M600 motor, already wired and ready if you want to fit one. Shame about their user interface which is about 3 years behind Bosch, but at least they don’t rattle and most parts available😀
 
Rob Rides EMTB said:
Can you hit the limit on the steepest inclines? Rock slabs that you’ve never even considered before because of the gradient? This is what the motor is made for. Not really for cruising flats and hitting the limiter 😂
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To be honest, when it's silly steep and I have to use Gen 4 CX Turbo I'm near flipping the bike!
 
Which bikes will get this motor? Can it be put in older trek bikes?
 
So, this is my understanding Rob...correct me if I am wrong. The new Race CX is no more powerful than the regular CX4 at 85nm. It's basically just a software update or different interface to have the motor power engage differently? The motor has been beefed up internally to handle the harder hit??
 
And, I suspect that this mode will make an appearance in the future also, in future motors for sure.
 
Any change to the internals ? alloy or plastic gearing ?, ceramic bearings, carbon casing or other magical stuff :)
 
2WheelsNot4 said:
Any change to the internals ? alloy or plastic gearing ?, ceramic bearings, carbon casing or other magical stuff :)
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There’s 150g weight savings, but no exact details have been given of where from. They did say they took it to the absolute weight limit - any lower and power would have to decrease, or early fatigue on parts might occur.
 
This is not new - they have done it many times on motorcycle bikes/engines.

In 1999 I got the Yamaha OW02 - it's produced in very limited numbers, lighter, more powerfull, made for racing, very bad maintenance scheme and extremely expensive.
 
More power less range, pick your poison. I ride a bike that has the ability to tune the run on and as stock it was very evident and not to my liking so I tuned it out except for the tinyest amount that sometimes aids in shifting after letting off on the pedals.
 
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