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114.5 gi to be exact with the Big Ben tyre. We have very steep hills but I am no longer strong enough... Spinning out at 40 km/h is just a little slow for me about 50-55 km/h is more my sweet spot, above that I hunker down and hang on tight. I have 26:40 low gear at the moment which works most...

What I have read about it is that it is a complete drivetrain. The cheap solution is to move to a Sunrace 10 speed 11-46 cassette and Shimano derailleur and shifter.

With that load you could try 46/30 or 48/32. I can't spin out on my 26" trike with a 48:11 top gear so I am going to mount a 48/32 double on my GSM motor.

The theory says < 5% drag, for some that is too small to notice. I would say the GSM adds about 3% extra drive chain loss when pedalling unpowered but on such a heavy bike it is really negligable.

Preface of EN15194: "This document specifies the safety requirements and test methods for evaluating the design and assembly of electrically power assisted bicycles and sub-assemblies dedicated to systems using a battery voltage up to 48 VDC or an integrated battery charger with an input of 230...

If you add those Watts to the power of the motor Woosh recommended (48V SWX02) and use a MTB triple you should be OK. It sounds like you have a good sense of balance (unless your disability has robbed you of that) so using PAS alone lower climbing speeds are possible. That is the big downside...

Dongle...

All connections is the place to start. You do have a multimeter I presume?

You haven't been reading or understanding my posts... I am not the kind of person to recommend something that would damage another persons motor. Some of us don't have the finances to buy so we make our own. As more money comes along we upgrade. Read my build threads - all the issues I have...

My cut off speed is set to 25 km/h My battery is 44.4v nominative (EN15194 specifies 48v) So I am well within the limits of the law. When you consider a 36v motor is designed to work with a voltage of 42v, battery hot off the charger, and that the great majority of motors are built with...

We will need more details to know what you mean by "I’m struggling to get it to work".

Sorry Mike but I am calling BS on this false idea. I live in the Basque country and my new flat is surrounded by >15% gradients in all of the three directions I can take to leave it. On my normal commute there is a stop sign at the top of a >13% gradient. PAS works just fine if you have the...

Works for me Russ.

You don't need cutoff switches on both wheels. Hydraulic disk on the front and v-brake on the rear is the lightest, best performing setup on the road.

The problem is that no one respects the basic rules any more. I am witness to constant dangerous high speed driving, especialy in sensitive 30 km/h areas, stop signs not respected, indicators apparently optional, cars parked on bike paths and footpaths... Politicians can write all the laws...

Russ, I think if you put in a top horizontal menu option with the link to new posts you would make a lot of people happy. Looking at the code it is a pretty basic thing to do. Electric bikes - kits - emtb - road/commute - new posts Something like that might work in about the same amount of...

I did suggest the Yamaha motor which mounted on the https://www.giant-bicycles.com/fr/explore-eplus-0-gts-2019 and with a 44-32 chainring replacing the original 48-36 would climb 20% gradients. Hey let's go the whole hog and replace the cassette with an 11-46 11 speed! Here is the math...

If you use the correct gearing a legal 250 W mid-drive will climb anything up to 17% with little effort. I haven't tried 20% yet, mostly because there is too much trafic and as it is very steep they are all driving like maniacs... I am using a 48 v battery (44.4 v in reality). With a mid drive...

Or a Yamaha motor with double front chainring, that will climb walls (at low speed) in the lowest gears, check out the Giant range.

I haven't established a hierarchy but the French are pretty good at putting animals first too. You can give directly to your local tramp, you know that the money will be reinvested immediately into a local brewery thus creating employement!