Solid tyres

Recumbents and all feet forward machines

Solid tyres

Postby Drifter » Mon Dec 08, 2008 6:06 am

I have started building a trike and have collected most of the parts I will need. I will be using a pair of wheelchair wheels on the front and my question is - has anyone tried solid rubber tyres on a trike ?
Are they too hard , too skinny , too slippery.
For every uphill there is an equal and opposite downhill.
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by BNA » Mon Dec 08, 2008 9:57 am

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Postby Joeblake » Mon Dec 08, 2008 9:57 am

I suppose if somebody uses them on a wheelchair they shouldn't be too bad.

Is your trike going to have suspension?

Joe
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Postby sogood » Mon Dec 08, 2008 10:09 am

Joeblake wrote:I suppose if somebody uses them on a wheelchair they shouldn't be too bad.

Wheelchairs hardly ever roll at 60km/h. ;)
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Postby Joeblake » Mon Dec 08, 2008 10:21 am

True,

But they still get a hike up. I was out triking round South Perth one day when Louise Sauvage went whistling past in her sports racing chair.

http://www.wheelchairsportswa.org.au/2/ ... Sauvage.pm

I eventually found myself cranking along at just under 30km/h and barely making ground on her.

I honestly considering buying one of those racing wheelchairs because it looked like a great buzz.

http://lenmac.tripod.com/sports.html

But in searching for a piccy of a racing chair I hit this website. Check out the off-road chair.

http://www.sitski.com/razor.htm

WOW!!

Hey Santa Clause ...

Joe
To acquire immunity to eloquence is of the utmost importance to the citizens of a democracy
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Postby Storm » Mon Dec 08, 2008 1:42 pm

Image
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Postby Drifter » Mon Dec 08, 2008 3:59 pm

Some good replies there - hi to you all. Yes the trike will have rear suspension. I will post some pix when i am allowed, only a few more posts required.
For every uphill there is an equal and opposite downhill.
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Postby Joeblake » Mon Dec 08, 2008 4:26 pm

Wow, these guys are Nucking Futz ...

http://www.youtube.com/watch?v=f4fpf1-s1E8

Whoohooo.

Joe
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Postby Drifter » Mon Dec 08, 2008 6:48 pm

JoeBlake, that sure looks like fun to me.
But I still would like to know if my solid rubber tyres will be too hard or not, has anyone tried them on a trike?
For every uphill there is an equal and opposite downhill.
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Postby Joeblake » Mon Dec 08, 2008 7:14 pm

Yep, back to being serious.

What size are the wheels/tyres? Are they the little dolly wheels at the front or the big ones that the user pushes?

Image

If the latter I'd have to say I've only seen pneumatic tyres on the big wheels, not solid ones.

If you are talking about solid "big" wheels, I'd be a bit careful. Without the same degree of "give" that a pneumatic tyre has, I suspect there'd be a tendency to break loose in a tight turn.

I think it would be helpful if you could contact one of the administrators of the board and ask them if they could post a link for you to a photograph of what you're trying to achieve.

The mental picture I'm drawing looks really weird.

:? :lol:

In answer to your last question, I've not seen anybody using solid tyres.

But as a general principle, I'd not want to use solid tyres for a number of reasons. As Sogood pointed out, it isn't usual for ("normal") wheelchairs to travel at the speeds recumbent trikes can move at.

Joe
To acquire immunity to eloquence is of the utmost importance to the citizens of a democracy
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Postby Drifter » Mon Dec 08, 2008 7:28 pm

JoeBlake, the wheels are the big ones and are 22"x1". I want to use these wheels because they are a nice sturmey archer type with drum brake hubs. I can't Imagine myself going much over 40K as I am 59 and will be riding mostly on cycle paths.
There , thats one more post. Wont be long now
For every uphill there is an equal and opposite downhill.
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Postby Drifter » Mon Dec 08, 2008 7:31 pm

One more post. I bought the wheel chair at Mitre 11 ( the local recycle depot ) for $40.
For every uphill there is an equal and opposite downhill.
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Postby Drifter » Mon Dec 08, 2008 7:33 pm

I better go and put my pix up on photobucket now because this is my 10th post
For every uphill there is an equal and opposite downhill.
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Postby Joeblake » Mon Dec 08, 2008 7:35 pm

Okay,

Will look forward to it.

Joe
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Postby Mulger bill » Mon Dec 08, 2008 7:44 pm

Drifter wrote:I better go and put my pix up on photobucket now because this is my 10th post


Sorry Drifter, you'll need to be a member for seven days as well :(

A PM to any mod with some 'bucket links should get them up a bit quicker.

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Postby Drifter » Mon Dec 08, 2008 7:55 pm

Thanks Sean, I think I'll just keep everyone in suspense for a bit longer
For every uphill there is an equal and opposite downhill.
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Postby Storm » Mon Dec 08, 2008 10:14 pm

I have never used them before and I would expect they will roll off the rim during some of the heavy cornering that I do, upright bikes and wheel chairs wheels tend to feel vertical loads not the horizontal loads produced by trikes, sure if you were to go in a straight line then brake hard and travel the corner slowly the they may work for you and stay on the rim, "you already ave em so why not give em a go". My local BS has the hard tyres in all different sizes, they are much heavier and harder and have a smaller road contact patch than a pnumatic wheel.

You could eventually relace the nice hubs with 20" rims if you have trouble finding the 22" tyres.
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Postby Freddyflatfoot » Tue Dec 09, 2008 7:17 pm

Just a couple of points on using wheelchair wheels.
The hubs are great for using the wheels with stub axles. I made a trike for my daughter using wheelchair hubs.
For many reasons, I wouldn't use solid tyres. They would ride rough as guts, may not be perfectly round, and would be heavier than an air inflated tyre.
My lean would be to utilise the hubs, and lace them to either 16 or 20" rims.
There are a good range of tyres in these sizes, especially the 20" (406) size, and the smaller rims will make it much easier to be able to turn the trike.
If you have wheels too large at the front, you introduce other problems that need to be overcome, such as too big a turning circle, too wide a track, or difficulty in accessing the 'cockpit'. It also makes it harder to keep the CofG lower to improve handling.
another issue with larger wheels, is that in hard cornering, they have a tendency to 'taco'.
FWIW, I have been using 20" wheels, but I am now thinking that I may build another trike using 16" wheels, to improve turning clearances.
Have a look at what Greenspeed are using!
Have fun with your build and ask lotsa questions!
Cheers!
Rob
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Postby Drifter » Tue Dec 09, 2008 9:03 pm

Thanks Storm and Freddyflatfoot , all noted.
Yes I suppose the only way to find out is to try them out and go from there, I have all three wheels mounted now so the build is progressing well. the workshop, at me mates place, is closing down for xmas soon so it looks like sometime in january for a test flight.
cheers.
For every uphill there is an equal and opposite downhill.
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Postby Leigh_caines » Fri Dec 12, 2008 3:38 pm

My guess is...
One big downhill ride with a corner at the bottom, on them hard ones, and you'll be looking for "Air"
I'd be getting them hubs built into 20inch rims
But I"ll be interested in your first big ride :)
It's got to be fun
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Postby Drifter » Fri Dec 12, 2008 3:58 pm

Hello Leigh, my first "big ride" might be my last. I hope not, maybe if I get Recycler to do the test drive - mmmmmmmmm .
Merry Christmas to you all
For every uphill there is an equal and opposite downhill.
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Postby Leigh_caines » Fri Dec 12, 2008 4:45 pm

The Recycler is a good man but when it comes to test rides he like to stick me on first... :roll:
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Postby Drifter » Fri Dec 12, 2008 4:53 pm

OK , you'll do
For every uphill there is an equal and opposite downhill.
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Postby JulianEdgar » Sat Mar 21, 2009 8:44 am

I was reading about old bikes - really old bikes - that used solid rubber tyres. I'd always thought that 'solid' meant just that but it appears that the tyres on those bikes were actually about as soft as a squash ball.
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Postby Drifter » Sat Mar 21, 2009 9:00 am

G'day Julian,
The tyres feel quite hard, about the same as a road bike tyre , The build is going very slowly at the moment because I am building kayaks as well , also I am waiting for Recycler, to return from India to help me.
Robert
For every uphill there is an equal and opposite downhill.
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