Difference Between Performance Line Sport vs Speed

JemJam

New Member
Region
USA
So I see the spec sheet differences of 65 vs 85 NM of Tq. 300 vs 340% max boost.

From the descriptions it seems like the speed is better able to hold up to max speed.

I rode a Tern HSD S11 with the Sport, and it felt like there was a taper after 20 and on level ground pushing past 24 MPH it started to feel like it was more me than the motor providing the power, despite being in Turbo. I am wondering if the Speed would be better for that application and waiting to see if something like that comes out on the 2022 bikes would be worth it.
 

retiredNH

Well-Known Member
Region
USA
I have an Allant 8s with speed. The torque seems to kick in at higher pedal RPM, 80 or so. Of course with a class 1 motor like you tried, power would drop at 20 or so. 2022 Bosch offerings don't look to be much different. One big disadvantage of Performance Speed is that there have been no software updates in over a year, unlike the Performance CX, which seems to regularly get new goodies. You might keep that in mind.

Whatever you do, though, avoid the smartphone hub. Bosch seems to have ignored it for a long time. It's pretty limited in terms of what it does, compared to some of the more premium offerings.
 

JemJam

New Member
Region
USA
I have an Allant 8s with speed. The torque seems to kick in at higher pedal RPM, 80 or so. Of course with a class 1 motor like you tried, power would drop at 20 or so. 2022 Bosch offerings don't look to be much different. One big disadvantage of Performance Speed is that there have been no software updates in over a year, unlike the Performance CX, which seems to regularly get new goodies. You might keep that in mind.

Whatever you do, though, avoid the smartphone hub. Bosch seems to have ignored it for a long time. It's pretty limited in terms of what it does, compared to some of the more premium offerings.
The Performance Speed is a "class 3" that goes up to 28mph, but it just seems like it has a taper from 20 to 28 where you start losing the assist. I also did try cadences from about 60-120, but still not appreciably easier. So I am wondering if the difference between the Speed and the Sport might be that taper.

What updates did the CX get that make it better?
 

BlackHand

Well-Known Member
Region
USA
City
Western WA
Based on the specs, the Sport is probably a Gen3 drive unit. The CX is Gen4.

I can't speak to how either behaves as I have a Gen2 Speed drive unit, but your description of the Sport sounds similar to how my bike behaves. The support doesn't taper off until about 26 mph, but keep in mind that it takes twice as much power to go 27mph as it does to go 20mph and on a 250w continuous drive unit your legs have to make up most of that difference.

Edit to add this link from Chris at Propel talking about the sport. Sounds like it does taper off support quicker than the Speed drive does
 
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JemJam

New Member
Region
USA
Based on the specs, the Sport is probably a Gen3 drive unit. The CX is Gen4.

I can't speak to how either behaves as I have a Gen2 Speed drive unit, but your description of the Sport sounds similar to how my bike behaves. The support doesn't taper off until about 26 mph, but keep in mind that it takes twice as much power to go 27mph as it does to go 20mph and on a 250w continuous drive unit your legs have to make up most of that difference.

Edit to add this link from Chris at Propel talking about the sport. Sounds like it does taper off support quicker than the Speed drive does
Thanks for the video - that is pretty much my experience. Maybe 2022 will bring an HSD with a gen 4 speed + belt, or GSD with a Cargo Speed + belt.
 
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