Convert Q45 to ebike

Flying Dutchman

Well-Known Member
Further update on my Skarper experience after I've done a couple of 20-mile commutes.

My commute is mostly flat with a couple of relatively easy hills. For the hills the Skarper does exactly what's expected - it gives that bit of help to get up them more easily. I find I go uphill doing 10mph very easily. Now here in the UK, e-bike motors are restricted to provide support to 25kph (about 15.5mph). This appears to be my typical speed on the Q45 though so I tend not to get any or hardly any support from the engine. The funny bit is that if I stay just under the 25kph I get support and it runs very easily, so much so that I want to change gear. However when I do that, I go past the 25kph at which point the motor cuts out, so I have to shift down again.

But apart from that I am very happy with this solution. I still get a good workout (some 2 1/5 hour on the bike) and I am not totally shattered by the time I get to work. Win-win. As for battery usage, I use about 50% each way so I can make it there and back on one charge - just about. It might be different if I have strong headwinds in one direction though - I haven't had that as yet.

To answer @llavalle - the solution that I got from Skarper is not the standard solution but it is basically doubling up on the strap that comes as standard.

@Robert Holler Skarper will come to the Taipei Cycle where they will try to link up with you.
 

llavalle

Member
To answer @llavalle - the solution that I got from Skarper is not the standard solution but it is basically doubling up on the strap that comes as standard.

@Robert Holler Skarper will come to the Taipei Cycle where they will try to link up with you.
Interesting. I would definitely prefer their solution over the BiMotal one. I feel like pulling on the 2 small M5 screws of the flatmount caliper is just asking for trouble.... (and not officially supported anyway)
 

llavalle

Member
Interesting. I would definitely prefer their solution over the BiMotal one. I feel like pulling on the 2 small M5 screws of the flatmount caliper is just asking for trouble.... (and not officially supported anyway)
So I reached out to BiMotal.

Their answer :

I am familiar with the CRUZBIKE and our system is compatible with the frame.
You'll need to purchase a coupe of upgrades:

  • A brake mount adapter: 140mm flat mount to 160mm post mount.
  • Upgrade the rear brake to a hydraulic 4 piston caliper. There is a compatible mechanically actuated brake that could work, but it's the same price if not more expensive than upgrading to a hydraulic brake.

Here is a list of value-priced calipers if you need a recommendation:
• Shimano: MT420, MT520, Deore BR-M6120, SLX BR-M7120, XT BR-M8120
• SRAM: DB4, 6, 8, Code, Level
• TRP Slate EVO
• Tektro: Orion, Gemini 4-piston
I'm already have FM 140mm to PM 160MM adapters on the way to put MTB hydraulic disk brakes on my A4X (was planning on cheap MT-200 with the longer reach handles but I guess I could get a set of MT420 instead)

Interesting to say the least.
 

bhave

Member
Has anyone tried to convert the Q45 to and ebike using a front wheel conversion package on the back wheel of the Q45? I can't seem to find a package that will work with thru-axles. I previously converted my S40 to an ebike using the following kit that I purchased on Amazon:

48V 500W Front Hub Motor Electric Bike Conversion Kit for 26inch Wheel Drive Engine with Display with Battery (C18,Rear Battery 48V 17.5Ah)

I used the bike in a 2400 mile tour and it worked great. The S40 has QR dropouts so there were lots of ebike kits available. Seems no one provides one for thru-axles. I have sent a query to Grin Technologies' as they look promising but that seems to be the only possibility at this point.

For the Q45, I would like a 250W motor with a large 36V battery as I wan't it to meet EU requirements for ebikes.

Thanks,
Bill
I have the 2019 Q45 with the QR axles. Have put a 1500W front wheel motor with a 52v 20ah battery on the rear. The bike became a recumbent motorcycle.
 

llavalle

Member
So I reached out to BiMotal.

Their answer :


I'm already have FM 140mm to PM 160MM adapters on the way to put MTB hydraulic disk brakes on my A4X (was planning on cheap MT-200 with the longer reach handles but I guess I could get a set of MT420 instead)

Interesting to say the least.
Update on Bimotal : it doesn't fit on the A4X. Might be super tight fit on a Q45 or other frame but the A4X rear end does not fit a 180mm rotor (and the others are awfully close too...).

 

llavalle

Member
Not model specific.
Looking forward to this - I'm almost tempted to get a Grin All Axle kit but holding off for now! (well, not doing nothing, 3d printing different batteries to see what they would look like and where I can put them)

I also discovered this company : https://bikeebike.it/en/

They make an odd contraption called the "Lightest" but it clearly can't have a throttle. Their "Best" system might have one but it's ... humm.. fugly?
 
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