BMW K1200lt trike. Tyres size.

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BMWLT1200
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BMW K1200lt trike. Tyres size.

Post by BMWLT1200 » Wed Jan 15, 2020 11:51 am

Hiya all. New here.
I own a K1200lt trike 1999 T plate. It was already triked when I bought it. It had 15” rims and believe reliant rear axle. Now the trike has been stripped of its Tupperware and is in process of respray. The tyres were knackered and am wondering what is the best size tyres for me to get on 15” rims.
I was reading ‘Uglymick’ 2017 post regarding trike build considerations, with interest, but went over my head.
I don’t know which rear axle is on it but will try clean it up and photograph it to add to post.
Any help appreciated and thanks in advance

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lepchaun
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Re: BMW K1200lt trike. Tyres size.

Post by lepchaun » Wed Jan 15, 2020 12:58 pm

hi I run mine on 205/50/15 on a B stamp reliant axel if u look at the back of the housing in the middle of the axel it should have a letter on its own most common is A but there is some B stamp the B is the better ratio mine is a B stamp
hope this helps
welcome to the forum when u get a moment can u pop over to new members and introduce yourself
Ta Lep
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BMWLT1200
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Re: BMW K1200lt trike. Tyres size.

Post by BMWLT1200 » Wed Jan 15, 2020 3:08 pm

Will do. Thank you

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Re: BMW K1200lt trike. Tyres size.

Post by jinjachin » Wed Jan 15, 2020 7:49 pm

have you had it on the road if so how were the revs compaired to speed or was it reving high

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Re: BMW K1200lt trike. Tyres size.

Post by BMWLT1200 » Wed Jan 15, 2020 8:09 pm

Ridden quite few times in 2018 when we got it. Revs sounded relative to speed, wasn't screaming at 70 probably 2.5 to 3k revs, to be honest can't remember.
Thanks

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Re: BMW K1200lt trike. Tyres size.

Post by BMWLT1200 » Wed Jan 15, 2020 8:16 pm

How do I identify rear axle can't see any letter A or B anywhere.There is ADCI on it, where will I find ID letter
Where is drain plug located please
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jinjachin
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Re: BMW K1200lt trike. Tyres size.

Post by jinjachin » Wed Jan 15, 2020 8:55 pm

if you are happy with the way it revs while riding fit the same size tyres. width of the tire will not alter revs but a dia change will

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lepchaun
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Re: BMW K1200lt trike. Tyres size.

Post by lepchaun » Thu Jan 16, 2020 5:40 am

I agree with jinj
there is a flat section on the back of your axel by the box section that looks like a tow bar it should be there
there is no drain plug for the oil only the filler plug so if u want to drain it a tube and syringe

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Re: BMW K1200lt trike. Tyres size.

Post by terryt » Thu Jan 16, 2020 8:47 am

As your this far with it take the axle off split it in half and count the no of teeth on the crown and pinion wheels to be sure. if there is no stamp its more than likely a 3.23
As Jinj said if your happy with it as is fit the same size. as long as it pulls away fine and you got some if you need it on top end

My old gl1000 ran at 70 @ 3500rev on 205/55/15 with a 3/23 axle my gl1500 runs at 70 @3600 revs on 205/55/15 with a 3/23 axle. changed it to 3.06 diff revs dropped down to about 3.400

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Re: BMW K1200lt trike. Tyres size.

Post by BMWLT1200 » Thu Jan 16, 2020 12:25 pm

Much appreciated for replies. Not confident enuf to split axle.

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