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Author Topic: Trike Front Tyre Advise Please  (Read 11048 times)
paulywombats
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« on: October 17, 2017, 02:11:46 PM »

Hi all

I am busy converting a Honda ST1100 to a trike.

It has a 120/70 R18 front tyre fitted at present.

I have read about a sidecar tyre being fitted to reduce, or at least help with, wobble amongst other benefits.

My question is can I fit a 4" tyre to a 3" rim. The only tyre I seem to be able to find is a Metzler Block K sidecar tyre, which is 4.00 18.

All replies are very much appreciated to this novice.

Paul
« Last Edit: October 17, 2017, 07:09:38 PM by paulywombats » Logged

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terry t
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« Reply #1 on: October 17, 2017, 07:46:35 PM »

I put a side car tyre on my gl1000 and to be honest it didn't do much. so I reduce the trail down from 4.5" to just under 2" and now there's no steering wobble or shaking.

On my gl1500 didn't need any alterations to the trail. and it running on the original spec bike tyre

I would work on getting the steering trail down to about 2" as I don't think a side car tyre will work for this setup
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paulywombats
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« Reply #2 on: October 18, 2017, 11:43:37 AM »

Thanks for that Terry, interesting stuff.

Have you had any experience with steering dampers?
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terry t
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« Reply #3 on: October 18, 2017, 11:54:23 AM »

Thanks for that Terry, interesting stuff.

Have you had any experience with steering dampers?
No I haven't. personally I don't like them 
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Olds
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« Reply #4 on: October 18, 2017, 03:05:45 PM »

Check out the tyre and rim size chart at the top of bike tech.
Main reasons for changing to sidecar tyres is the different road contact patch afforded by the flatter profile and the stronger sidewalls.
Some bike tyres have a very narrow contact area in the upright position.
You may find lowering the tyre pressure a little will help. Then again it might not.

I have a massive amount of trail (about 6") Steady as a rock but the steering does get a tad heavy at speed.
« Last Edit: October 18, 2017, 03:08:37 PM by Olds » Logged

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paulywombats
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« Reply #5 on: October 18, 2017, 04:21:03 PM »

Thank you Olds

I am probably jumping the gun with this as I have not had it out to play yet.

Just like to try and foresee any possible challenges.

It seems I could fit a sidecar tyre, will try with lower tyre pressure

The trail is 4" on the Pan ST1100.
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BikerGran
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« Reply #6 on: October 19, 2017, 01:01:58 PM »

I reduced the head shaking on my GT550 trike by lowering the tyre pressure to about 25, and letting all the air out of the air-assisted forks - guess you could do something with changing the amount or viscosity of the fork oil.

But the thing that made a HUGE difference was getting custom-made extended yokes fitted, to change the trail.  Not only stopped the headshake but made the steering much lighter too.
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paulywombats
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« Reply #7 on: October 19, 2017, 06:56:24 PM »

Thanks Biker Gran, interesting stuff, do you have a pic?
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BikerGran
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« Reply #8 on: October 19, 2017, 11:07:18 PM »

Not particularly helpful ones, but this album shows roughly what was done.  It's on Facebook but you don't have to be a member to see it, just follow the link.

https://www.facebook.com/media/set/?set=a.873110349373097.1073741890.100000224199684&type=1&l=a366d1596d
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paulywombats
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« Reply #9 on: October 20, 2017, 01:11:05 AM »

Thanks for that Bobbi, I get it.

Once I've got the Pan put together, I will see how the handling goes and take it from there. A few ideas to try thanks to all you good folk.
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stinkey
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« Reply #10 on: October 23, 2017, 05:32:48 PM »

I've used a steering damper on a trike which was well worth doing and helped a lot with front end shake..( springer front end ) and a cheaper option than new yokes ? My advice is try starting with tyre pressures first then fork oils,then a damper etc ?
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paulywombats
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« Reply #11 on: October 23, 2017, 09:16:47 PM »

Thanks Stinkey, really appreciate the advise.
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BikerGran
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« Reply #12 on: October 24, 2017, 04:10:36 PM »

Yes but the yokes are so pretty!   Wink
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paulywombats
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« Reply #13 on: October 24, 2017, 07:07:35 PM »

Very pretty.

Nice job on your yolks Bobbi.
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BikerGran
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« Reply #14 on: October 25, 2017, 07:54:20 PM »

They were made by a bloke who used to post on here - I've forgotten his handle now.  Irrelevant though cos he moved to the middle of nowhere...........
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