Benno Carry On 48v RH212

[flat_tire_master]

I will try to give a description and feedback on the build I am about to start.
The bike is a mid-tail Benno bike that I got new at the end of last year (quite expensive brand, but was a 2019 model with a good discount, and the quality and components seem very good, and to be honest anyway I couldn't find anything else in the mid-tail category). It's been sitting in my office until now because the winter weather didn't get me in the right mood.
I got it with 2 options, the front mini-rack, and the rear rack mini side loader set.

Now all the components are on their way and should be delivered in the next 2 weeks :

Motor :
- RH212 from Grin tech
- Baserunner L10
- Cycle Analyst v3
- PAS sensor
- Torque Arm v4
- Tripwire pull

Battery :
- Hailong 48v 16Ah Panasonic cells from Unit Pack Power germany warehouse

Lights :
- BUMM IQ-X E
- Supernova E3 12v

Rear rim :
- Ryde Andra 40 24" disk

Accessories :
- Abus nutfix for front wheel axle
- Abus nutfix for seatpost
- Ursus jumbo double kickstand

 

[flat_tire_master]

I am not sure about the right lacing configuration for the rear wheel.
I feel my 2 only options are the ones simulated below.

The single cross patern gives a bad(?) angle of 76.2deg. I plan to use a Ryde Andra rim, and Sapim Polyax nuts, but I can't find any good source of information regarding the max reasonnable angle. Ryde Andra says 8deg, but I guess Polyax increases the tolerance for wide angle.

I asked Grin if they can give me an advice on this, we will see.

 

[flat_tire_master]

To answer me previous interrogation, I had feedback from Grin. They advised to use a zero crossing pattern. Elbows out, and use washers at spokes head. If I had blindly followed what they advice on their spoke calculator webpage (great btw), I would have ended with the same conclusion. I guess this page and the explanations that go with it are carefully prepared.

So I ordered adequate spokes, nipples and washers : sapim strong (2.0 / 2.3 mm), Sapim Polyax 14g, and Sapim spoke heads washers.
I would have liked to choose Sapim E-Strong (2.3 / 2.6 mm), but my understanding is that it requires 13g nipples, and those ones would not fit in my rim holes. And I wonder what rim would accept it.

In the mean time I received most of the parts. Kit from Grin, wheel rim, some accessories such as lights, and the battery has also arrived I need to go pick it up on thursday.

*** Motor fit chek ***
Motor, once cassette is installed, fits nicely with no gap in the dropouts.
There is a bunch of washers provided with the motor, and I am not sure which ones I should use. It seems to me, considering the geometry of my dropouts, that tab-washers would be useless (the sides of the tab are not in contact with the frame). Their job will be done by the torque arm, which fits properly.
The motor has quite an offset relative the the center of the frame. The spokes lacing should compensate a bit. For reference, with the stock wheel, there is an offset also.
I am a bit worried about the gap between the motor and the brake caliper, which is almost touching. It's hard to tell until the final assembly is done. A small chamfering of the caliper might be needed, we will see.




*** PAS sensor installation ***
First I removed the middle and small chainrings, I will keep only the 48T.
I got the grin PAS sensor made for chainrings. It fits almost right. The only trouble is that I have M8 screws on my Shimano Deore crankset, and the hole in the PAS ring are 5 mm. I will drill larger holes in the plastic.

 

[LewTwo]

Nice Looking bike. I really like the overall size.
I saw something somewhere about them no longer offering any models w/o electric conversion.