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Weight is a big factor when it's hilly. A 90 kg rider over moderately hilly terrain would get about 20 miles out of a 10Ah battery if he/she pedalled lightly or about 30 miles with medium pedalling on a high level of assist. A 60kg rider would go about 30 miles with light pedalling. You'd...

There must be something wrong with your meter. It's a direct connection between the battery and the MOSFETs, so there should be no resistance, but at least we've established that that part of your controller is normal. You didn't answer whether pin 2 is joined to pin 1 on your new battery...

That might not be the best option now if he's wiped out his controller. The problem was that his original battery was OK and he wanted to continue to use it, but he also wanted a larger capacity one, which is why he got the replacement. Before we do anything else, we need to find out what the...

It's very simple as long as you know what you have first. That's the difficult bit. You're right to ask the question if you don't have an ebike yet because it's easy to replace, refurbish or upgrade the batteries on some bikes, while as a few are virtually impossible, which is even worse when...

Brake pads get glazed and lose efficiency when they're touching the disc all the time. That happens when something stops the caliper from retracting properly. On a car or motorbike, it's normally corrosion on the exposed part of the cylinder, but on a bicycle, it's most likely just accumulated...

I'm not sure you got what I meant by the rims being the wrong shape. Your brakes clamp in the radial direction. Modern rim brakes clamp in the axial direction, so you need a specific vintage rim that has the braking surface in the right place. Might be this one...

35 to 40 psi will be about right. On all my bikes, I always pump until it starts to become hard to pump. I never use a pressure gauge.

Now that we know the pins that have power on your old battery, we should be able to figure out whether it has remote switching. Pin 1 is ground and pin 6 is battery voltage. The pin that powers the motor goes directly to the MOSFETs, so check that pin 1 has continuity to the back plate on any...

You get a voltage like 11.4v when the BMS is switched off. Replacement batteries are normally dumb and they don't allow remote switching, but you haven't given any details of what it is or where you got it from, so I can't confirm that. Assuming that it is a dumb battery, the question is why...

What about all the other pins? I expected 5 results for each battery. If you want a quick solution, please do what I say. Place the battery up the way it goes on the bike with the six slots facing you. The left pin is pin 1, so lets see for each battery: Pin1 = ?V Pin2 = ?V Pin3 = ?v Pin4 = ?V...

You often don't get a chance to explain anything, especially when they have their clever mate advising them. I can imagine many ebike salesmen chuckling when they read that. They'll know what I mean even if you don't. It's not just people in shops either. Look back through the "Which Bike"...

Your brakes won't work with an ebike mote wheel because the rim is the wrong shape. You either have to cut the rim off your existing wheel or buy a similar one from Ebay, then lace whichever to the motor.

This is going to take ages because of the non-standard wiring and connectors. First, you need to identify the ground pin in your old battery. It's most likely one of the outer two, so probe between them to see if you can get any voltage between them. If you can't, put the black probe on one of...

That's exactly right, but the problem is that many people browse through these forums as research to help choose a bike that meets their needs. Most of them have no idea of the factors that affect range, so they take any data at face value, which may leave them very disappointed. Having worked...

Have you got a voltmeter?

Are you happy that you have the necessary DIY skills for the soldering, wiring etc?

32 spokes in the front and 40 in the back severely limit your choice of motors. If you have a good wheel builder, it is possible to build a wheel with a 36 hole motor and a 32 hole rim, in which case you could use a Q85 kit from BMSbattery...

These GTF batteries are showing up more and more across Ebay and other websites that sell Chinese stuff...

I told you not to get a battery until you've figured out the connections. You have two options now. 1. Open up the old battery to figure out which pins are connected and what functions the connections have. 2. Get a new controller that uses a two-wire connection to the battery and wire it in to...

In the Amazon listing, it shows the wright as 4.15kg! It shows the shipping weight as 726g, so the box must be made of anti-matter. Could you weigh it in its carry case? Could I buy the box from you? I need something like that to reduce my battery weight?