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Using Grin's methodology and calculator, I've arrived at spoke lengths of 207 and 206mm. That's fine but, their graphic display reckons I'll get 72% tension one side and 28% the other to get the offset. The advice is to be as close to 50/50 as possible but nothing I alter (within measurements)...

Going to need a bit more detail Brian. Is the pas sensor the one with a seperate disc? If so is the disc within a couple of mm of the sensor head? Does it run parallel to the head? Does the disc turn with the shaft? As the magnets pass the sensor does the led flash? Do you have a throttle...

Ooops! Shows how attempted humour can go wrong without the aid of facial and tonal expression. Got everything in place now to start measuring for spokes and the learning can continue.

Thanks Guerny, might consider those 'cos they obviously help you get up hills fast:rolleyes:

Just spotted that, on the TBK spec, the motors' gear ratio is 10.5, whereas on the label it says 8.1. I'm assuminmg this means that the rotor will spin slower for a given rpm. As this motor is specced at 48v/328rpm but I'll be using it at 36v to get 250, will this be a problem given the slower...

The rim has arrived. I've watched the Grin wheel building and hub measuring video's and will be measuring stuff tommorrow. I read the Sheldon Brown stuff too, but I couldn't retain it. I function better with visuals. The motor had this sticker on it: I've removed it and this was underneath...

Plan is to use my Ezee rear rack battery which fits on a top hat din rail. So, easy enough. However the Velotechnic rack is only 130mm wide whilst the battery is 150mm. Could just mount it on top but this would stop me being able to hook panniers over the top bar. Was thinking of buying a...

Thanks - not sure I understand the maths, however, I have bar end shifters and the rear one's indexed for 8 (deraileur is currently restricted to 7). Main aim is to increase the 'space' between ratios so I can feel the difference so it's probably going to be the11-32.

While I'm waiting for the rim (thanks for the help chaps) I'm looking at the gearing. Currently the rear cluster is a 14-28 freewheel. I find the ratios a bit close, it's difficult to feel when it has changed so often end up going two. On a bent, it seems you have to spin more on hill...

Thanks Neal, I searched bankrupt bike parts but missed that one. Just ordered it. Thought of using the existing rim but have a notion to sell the wheel/motor.

jeez! Been searching for about 3 hours. Cannot find a 26" 36 H black double wall rim of 19-21mm width with no eyelets. Are the eyelets a deal breaker? I have, so far, only looked at rims under £40

Confused already. Tyre is labelled 35-559 26 x 1.35. Existing rim is unmarked. So what double wall rim do I need?

Kit's arrived, all present and correct. Now need to find a 36hole 26 inch rim. Anyone got any recommendations? I'll be asking for wheel building helplater, such as how the hell do I work out the offset and then different spoke lengths? Also looking for an 8 speed cassette, going to try for one...

Order was scheduled for the 23rd, just been messaged to say it will be here today. 6 days from, I assume, Hong Kong via DHL. Well that's OK:D

I feel your pain/confusion. Just been through all of this motor stuff in my thread 'Return to the bent'. The 250/270rpm motors are the right ones for a 26" wheel if you want legal maximum speed. I've just bought an AKM128h from Topbikekit. Like you I needed that legal speed in a 26", but they...

On a recent holiday, 4 of us were out cycling the Kennet and Avon tow path. There waqs along run of locks just outside Devizes so a long haul uphill. I noticed that my brother in law had dropped way behind, so we stopped. When he caught up he was complaining that his motor had 'broken'...

Just paid DHL tax bill of 68.29. After working for 55years I really do resent paying more bloody tax ! *^&%&$)(*$%*:p

Order's been dispatched - the big wait is on. Went out on the bent last night, for the first time used setting 5/9 and got up a serious climb I'd not tackled before. But, my God, the Dillinger makes some odd noises, it really does not like hills.

The AKM128sxhc is what I've just ordered. I'll let you know how it goes.

It seems to come from the usual misunderstanding that an 800w motor 'sucks' that power when it will only produce what it is given. It's kinda like, I might have the capacity for a large portion of chips but if I'm only given a small portion that's all I can eat :D