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Author Topic: 190-50-17 on a 250R?  (Read 259 times)

Cabin2010

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190-50-17 on a 250R?
« on: May 31, 2018, 12:09:59 PM »

I've seen a pics of people who've put a 190-50-17 on the rear of a 250, would like to her from someone who's done it.  Handling, fitment ect. 
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stigger

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Re: 190-50-17 on a 250R?
« Reply #1 on: June 01, 2018, 01:46:54 AM »

Are you sure?
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Cabin2010

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Re: 190-50-17 on a 250R?
« Reply #2 on: June 01, 2018, 12:41:02 PM »

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spit051261

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Re: 190-50-17 on a 250R?
« Reply #3 on: June 01, 2018, 06:09:09 PM »

They spend lots of money working out the geometry of bikes for a reason .
The size tires  it comes with have something to do with safety me thinks as well as handling .
Why would you want to put a larger tire on on a small bike  ?
We are talking about a 250 here and not a drag racer I assume  :o
Be safe dude and keep it the way it was designed , for safety .
« Last Edit: June 01, 2018, 06:14:42 PM by spit051261 »
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umop-ǝpisdn

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Re: 190-50-17 on a 250R?
« Reply #4 on: June 01, 2018, 11:33:23 PM »

To answer your question cabin; Yes, it can be done. It would take quite a bit of work to do it though.

1. You are going to need a wider rim as well as the tyre. If you are willing to compromise a little bit, you can use a GT650 rim with a 180-55-17 tyre. This would be the easiest way.

2. To fit the wheel, you are going to need to either replace the swinging arm with the GT650 swinging arm. Keep in mind the accessory stuff, such as the axle, spacers, rotor, hub, disc, lines, chassis mount axle, etc.

or

3. Machine a set of spacers to centre the 650 wheel on the 250 axle. This will only work if a 180 tyre can fit between the gap on the 250 swinging arm. It might be that the 180 will rub on the insides of the swinger. The 650 swinging arm is known to fit a 180 tyre.

4. If you want to go for a 190, you are going to need a swinging arm off a bike that comes standard with a 190 wheel, such as a GSX-R 1000 as well as all the other stuff, such as brakes etc. The whole back end off the donor bike. You are then going to have to check and see if the donor swinging arm fits inside the chassis mount on the 250. If the donor swinging arm is too wide, it's a huge headache. If it's slightly narrower, then it's a pretty straight forward job.

If you are going to go to the trouble of option 4, I would suggest using a single sided swinging arm donor bike, such as a VFR800, or Ducati monster, because sexy AF and same amount of trouble.
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umop-ǝpisdn

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Re: 190-50-17 on a 250R?
« Reply #5 on: June 01, 2018, 11:35:13 PM »

In case you didn't already realise it, this is an expensive decision to follow through on.

Ohh and you will, as spitty said, ruin your bike.

It's an easy decision in the end, really.
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