Rebuild BM2 green...

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Rebuild BM2 green...

Postby Burgerman » 14 Sep 2015, 00:39

Just ordered some wheel rims, and tyres for my green slow 6mph BM2. I figured it will look pretty and doesent go very fast anyway so big rims, low profile tyres... Yes all opposite to whats needed. But I thought I would try it.

Wheels are 10 inch diameter x 4j wide.
Tyres are 130/60-10 and a bit cheap chinese and only temporary.
These are also available in 4.5 wide. And a 145/50-10 tyre can be used, I may change my order.

In both cases total diameter is 16.2 inches. So an inch bigger overall than the 3.50-8 tyres and the turf tyres on my other chairs.
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Re: Rebuild BM2 green...

Postby Williamclark77 » 14 Sep 2015, 02:23

I feel sorry for you back! Take extra baclofen for the clonis! :lol:

They will certainly look awesome though.
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Re: Rebuild BM2 green...

Postby stevelawiw » 14 Sep 2015, 12:11

They look nice and seem to have an offset which might work with the Invacare GB motors. Any chance of a link please?
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Re: Rebuild BM2 green...

Postby Burgerman » 14 Sep 2015, 12:21

Well we will see. Mine are actually wider than the ones shown. But the main issue and reason for the slow chair is to make a chair with ridiculous range.

As such I am replacing with tyres that roll easy... And replacing a stock 36km/22mile range F55 chair 56Ah Sonnenschien battery. (This really gives only 30Ah before you stop of course.) With a 120Ah lithium that really does give 120Ah. That's a huge 4x more. 22 Miles x4 = 88 miles! (that's the unrealistic ISO test, so maybe 55 to 65 percent of that is realistic.)
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Re: Rebuild BM2 green...

Postby rustyjames » 14 Sep 2015, 13:37

That bolt pattern looks large, will an adapter be needed to fit it to the motors?
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Re: Rebuild BM2 green...

Postby Burgerman » 14 Sep 2015, 14:12

PCD 91
70 between bolts measured to next one.
Centre hole 75mm.

130MM total width, 16 inch overall diameter inc tyre. Tubeless rim.

The reason I choose that wheel is because it will be easy to make or order a 108mm round disk, with 4 holes... Then I can drill to suit the 3 hole off road, or 4 hole trailer, or the groove type hubs as I wish. And cover the centre at the same time.
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Re: Rebuild BM2 green...

Postby Burgerman » 14 Sep 2015, 14:17

Link?
Ebay, or any monkey bike supplier worldwide.
They are available in 8, 10, inch diameter, and 2.5 to 4.5 rim widths.

http://www.minibikecraze.co.uk/monkeybi ... ts/wheels/ mine...
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Re: Rebuild BM2 green...

Postby Burgerman » 14 Sep 2015, 14:30

http://www.minibikecraze.co.uk/monkeybi ... ts/wheels/

They look nice and seem to have an offset which might work with the Invacare GB motors


If you want a non central offset you can order say a split rim wheel and centre, in DX in two widths and split them. Beware of valve hole though! And of course it wont be tubeless which rules it out for me.
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Re: Rebuild BM2 green...

Postby Williamclark77 » 14 Sep 2015, 21:56

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Re: Rebuild BM2 green...

Postby Burgerman » 15 Sep 2015, 00:23

Ordered... Thermal protection for winter! Its a thermal mask.
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Re: Rebuild BM2 green...

Postby sourstraw » 19 Sep 2015, 08:17

These are the wheels I was going to put on my M300. They look really nice and I'm sure would also look great polished.

I would have to modify my shroud to fit the extra height.

My concern is the overall chair width and fitting through my standard doors. I was thinking the double hinges may give me the extra space I need.

What's your opinion of this? Building a BM3 just isn't in the cards for me right now with my health issues.

What do you think about me using a smaller diameter of these wheels with a tubeless lawn tire? Pneumatic tires will give me a lot more comfort (I am not paralyzed and have tremendous pain levels) with increased absorption from bumps and uneven terrain.

I have had a hard time finding a tubeless lawn tire with a 3.5" width.
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Re: Rebuild BM2 green...

Postby Burgerman » 19 Sep 2015, 08:47

You wont find any narrow lawn tyres to fit an 8 inch diameter rim. You can use a 2.5 wide rim x 8 and fit any of the many 3.50 x 8 tyres, and only add 1 inch total width. Really its this or maybe a 2.75 to 3 inch wide rim, with a 110/80 x 8 tyre. That will still add 2 inches width to your chair.

http://www.shirebikes.co.uk/collections ... eless-tyre
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Re: Rebuild BM2 green...

Postby Burgerman » 19 Sep 2015, 10:39

120/70-8 tyre on an 8 inch rim that is 3.5 wide, results in a 4 inch wide tyre, with a huge sidewall, for a low pressure comfy ride.
Results in a 15 inch diameter, less an inch at the bottom when you reduce the pressure.

See the wider of these two.

You need to find a 8 inch rim thats 3.5 wide however that is tubeless. I have not looked.
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Re: Rebuild BM2 green...

Postby flagman1776 » 19 Sep 2015, 15:28

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Re: Rebuild BM2 green...

Postby Lord Chatterley » 22 Sep 2015, 01:45

BM - have you replaced the rear light bulb with LEDs?
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Re: Rebuild BM2 green...

Postby Burgerman » 22 Sep 2015, 10:30

Its not connected on 2 chairs, LED on a third.
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Re: Rebuild BM2 green...

Postby Burgerman » 25 Sep 2015, 10:53

Wheels and tyres arrived. They are much nicer and shineier in real life than expected. Very pleased. And about 1 inch bigger than the 350x8 tyres, and 1.5 inches bigger than the turf tyres.

Going to look really good. Will post pics once I get off this bed. The tyre profile or tread shape is very flat with a slight curve on a 4 inch wide rim. A cross between a motorbike tyre and a car tyre. And tubeless of course.
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Re: Rebuild BM2 green...

Postby Step » 25 Sep 2015, 13:42

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Re: Rebuild BM2 green...

Postby hank » 25 Sep 2015, 16:51

What size tyres you ended up with John. 145-50-10s on 4.5" Rims :o
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Re: Rebuild BM2 green...

Postby Burgerman » 25 Sep 2015, 17:11

rims are 4. Tyres are 130/60 but may try a set of 130/70 or the 145/50 depending on how they look when fitted.

The tyre in that picture above is narrower and taller and not inflated. These lookmuch better.
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