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Discussion Starter · #1 ·
Hey guys im trying to buy a new set of wheels and I was wondering if 12x4 4/90 will fit on the front and will 12x7 4/110 fit on the rears? It says that that's what the grom fits is it the same?
 

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If by 4/90 you mean 100/90 front
and by 4/110 you mean 100/110 rear
and the 12x7 ? .....7"wide rim ?

The front tire will be the same as the stock size
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But the rear will be 1 1/2" taller and 3/4" narrower than stock size
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And throw your speedometer off
 

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Discussion Starter · #3 ·
Yes thank you and since the rear will be 3/4" narrower does that mean I need a spacer or it will be fine?
 

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check my edit
. your putting on a 7" wide rim / thats at the tire not the axle mount width differance (spacer)
 

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just goggled the 7" rim now i see what your doing ....Pretty Sweet ;)
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But you mention grom above so If those are Grom wheels and not made for Z's you could have a bunch of problems ?

If you go with them Post up a Pic' / Haven't seen a Z' with that look yet
 

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If they dont show one for the Z' .. I doubt if they work.
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Sprocket alignment
chain clearance
disk brake alignment
axle and hub dimensions differences
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But the rear will be 3/4" narrower than stock size
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Of course The 4" wide tire will become 7" being mounted on the 7" rim
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Not sure how safe that is ? But I'll bet that's what everyone is doing .
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And my bike only has 1" max clearance per side at the front swing-arm and you need 1 1/2"
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so swing-arm Extenders will probably be required / longer brake lines ect'
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Probably lots of other issues, A call to one of our site sponsor's is your best bet
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Discussion Starter · #10 ·
Ya definitely need to do research on the extending on everything I will need. I appreciate the help this is a first for forums for me lol.
 
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