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My bike was bought new in Feb, it has 1.0.2, according to Speedbox, the firmware version is not an issue.

Yes, that does make sense.

Yes, 20-25mph is sufficient, any more and you're spinning out anyway.

I don't ride much harder with the Speedbox fitted, it just allows that bit extra cruising speed, I don't tend to ride much over 18-20mph I find that extra 5mph makes all the difference and as I have set tha max at 25mph, it's still pulling if I want a little extra. I tend to switch the Speedbox...

It will theoretically still allow the motor to assist upto 61mph (99kph) but obviously most bikes are geared to spin out at 25-30mph, it does allow you to set your own cut off speed, I set mine at 25mph.

I've had a Speedbox 3.0 fitted and working perfectly for over 600 miles.

A 12 speed Shimano SLX M7100 or XT M8100 derailleur and shifter will work fine with the Sram cassette

is it 11 or 12 speed?

Unfortunately a Shimano rear derailleur won't work with the Sram shifter

I'd check that the derailleur hanger is still straight also.

All rear derailleur mountings are the same regardless of manufacturer.

Looking at the photos, it's a new derailleur you need not the mounting bolt...

The Speedbox 3.0 is activated/deactivated with "walk" button or alternatively using the + & - buttons, this is all in the instructions which are quite comprehensive and also explain how to set a max speed.

Great service, thanks

I think the issue I've had is quite unique, no fault codes and random speed readings, I think the Speedbox I have has just developed a fault and the motor/firmware hasn't detected anything...yet!

Thanks, I have emailed Speedbox today and await a response. I purchased it through Amazon, so a return/refund is not an issue. Although I only utilised the Speedbox a few times, it was nice to have, hopefully I can get an answer to my issue, as I would like to refit one.

Hi, Are you aware of any issues with this Speedbox 3.0? I've had one fitted for the last 300+ miles but I only activate it for short periods, so it's only been doing it's job for approx 20 miles. Today it failed, the motor cut out and the display showed random speeds, I stopped, switched off the...

Today the Speedbox 3.0 failed ? I have only covered just over 300 miles with it fitted, it's only been switched on for a small percentage of that time, maybe 20 miles... I was riding down a country lane at approx 16-18mph when the motor cut out and the display was showing random speeds. I...