Matt hias

Review of Componentix

We bought Kettler Traveler Comfort Pro eBikes.

We bought Kettler Traveler Comfort Pro eBikes.
Unfortunately, Fahrrad XXL gave us completely wrong advice here and touted the 8-speed derailleur as absolutely sufficient for our very hilly region. After a lot of trouble and many trips that I couldn't drive because the gear ratio (11-32) was simply not sufficient, I installed at least an 8-speed cassette with 11-34. That went a little better but was still far from ideal.
After frustration over many ways that I just couldn't get up, considering selling the bike (which would have been an insane loss), I ended up with a very amateurish YouTube video that shows the conversion of an eBike from 9 to 11 gears on an eBike. After some research, I found out that my Hyperglide freewheel with the 8-speed cassette can hold up to 11-speed cassettes. For 12 gears you need another freewheel ("micro-spline freewheel" which costs at least 50-60 as a single part).
That's why I shot myself into an 11-speed conversion.
I wrote to various bike shops. Many did not respond at all to my special and complex request. Some have said that the 8-speed freewheel is not compatible with an 11-speed cassette and that the entire wheel or at least the freewheel has to be laboriously converted - which has now turned out to be not true!
Benjamin from Bike24 gave me great advice on this, confirmed my assumption that it should fit and made me a fair price for a complete conversion kit. Here I also got the option of carefully checking whether the cassette fits on the freewheel - to return it if it doesn't fit. With this option I had no concerns and I ordered the complete conversion set once:
1x Shimano Deore SL-M5100 Rapidfire Plus shift lever - 11-speed - right (SHI472065)
1x Shimano Deore RD-M5100-SGS Shadow RD + rear derailleur - long - 1x11-speed (SHI472051)
1x Shimano Deore CS-M5100 cassette 11-speed (SHI472187)
1x Shimano CN-HG601 chain 11-speed - with Quick Link - 126 links (SHI406628)

You also need a chain whip and a sprocket puller for Shimano HG as well as a rivet tool (Bike24 Cyclus Tools chain tool HG (CYC115824)) to change the cassette. A torque wrench is also useful.

The YouTube video was unfortunately too chaotic, so I looked at Shimano's homepage and found various instructions via "M5100". One of them (DM-MARD001-03) was very detailed with individual steps including pictures, explanations and all necessary torques.
This made the conversion work perfectly.

The new 11-51 cassette is just awesome. The new components shift significantly better and the translation in combination with the Bosch CX and a 20 tooth chainring at the front is just terrific.
The only drawback, the old chain guard at the front over the Bosch chainring no longer fits, as the chain arrives with a significantly more sharp sprocket due to the 51 tooth sprocket and would grind. For this there is also a solution from FSA called W1126 or the Miranda chain guard for Bosch drives. So everything is feasible and ingenious / clean solution.

I will now convert the 2nd eBike and then have it checked by my also super nice bike dealer.
Side note: I found a super reliable and fair free bicycle dealer through Google who serviced all Bosch bicycles and who also encouraged me to try the conversion myself for cost reasons. But he likes to take a final look at things with me, because I am technically fit but also more of a layman when it comes to bicycles.

Bike24 did a brilliant job here !!
Great advice, super nice contact (thanks Benjamin!), Absolutely fair prices and then even faster shipping.
I would say you did everything right - great! Keep it up!

I'm absolutely thrilled here and Bike24 has won a new regular customer who is happy to recommend you :-)
THANK YOU !