Roketa Bali 250 By scooter12 (Read 1,941 times)

[scooter12]

A bit confused. I was reading online, where switching sizes on tires can be bad or good, depending on correctly converting sizes . What is bad is if you buy a tire, 10% wider or thinner, because the tire could come off the rim. They had a motorcycle converting chart. So I looked up the right width conversion for my scooter. My scooter tire size is 4.00 x 12 and it said 110/90 in metric is the conversion for 3.75/ 4.00 in inches. So I ordered a new 110/90 12 tire for my scooter.

Well the tire came in.. Only cost $35 with free shipping. It was wider than the 4.00 tire by 1/3rd of a inch. So anyhow the new tire was only 7.8% wider- thus the tire would be interchangable. So I took off the front tire off my scooter. The new tire is slightly small in diameter, which is good.

Now Roketa has most confused about tire size. The OEM manual says 110/90 12 for front tire.. On the Bali 250 it has a plate- on it says 120/70 12 for front tire. On the tire( after changing front tire) says 4.00 12. I could swear a metric tire came with the origanal scooter( owned it since new). It was a street tire and they sent me a 4.00 12 tire. A 120/70 tire would be to wide for the front tire- a inch wider and over 10%. Also the online motorcycle tire article said, the aspect should not be less than 80%.

The 110/90 12 tire is rated P for 94 mph, rated 64 for 613 lbs load capacity( remember the wieght of scooter, rider and any equipment or passengers affects this). I am a lone rider, weight 180 lbs., bike weight 272 lbs, and gas and oil 16 lbs, luggage 25 lbs.. But said 4 ply tire on Amazon and is 6 P.R Reinf. I will be doing around 65 mph max so really don't worry about a blowout. It is 41 lbs of max pressure. It is a front tire also. I got 2 new Shinko tires- because the tire companies recommend a person don't mix match tires.

If for some reason the tire hits the fender, I will remove my fender and put on a smaller one.. What are your thoughts?

[vansmack2]

www.roketa.com/product/2/0/22360.shtml

On this page it says - Tires,front/rear ： 4.00-12 /120/90-10
If you have your old tire you can measure it, width, diameter, etc. and compare it to the new tire. Other than that I don't know what to tell you since I don't know the conversion number for a 4.00-12.

Here is what my 2006 JM Star manufacturer BMS Macho Man 250 branded scooter has on it:
Front Tire: 120/70-12
Rear tire: 120/90-10

I could check the width of my rims for you to compare with yours.

[gatekeeper]

If you go into the parts break down on the Roketa site for the 250 Bali it specifies a front tire size of 120/70-12. That is what I replaced mine with and it is fine.

www.roketa.com/product/parts_detail.jsp?partId=23417&partName=STEERING%20ASSEMBLY%285%29

[vansmack2]

Go to the page linked by gatekeeper then scroll to the bottom of the page. It is the third item from the bottom.

[scooter12]

The 110/90 12 fitted good. That is the size in the Roketa Manual that came with the scooter. The only thing about adding a 120/70 12 is the 120 mm is more than 10% wider than the 4.00- which every motorcycle site said, it could fall off the rim and be very dangerous. A 110 mm tire is 7.8% more wide than 4.00 inches. People can read it on the web..

[vansmack2]

I have a 150 and a 250 that both have a 120/70-12 on the front of them. Also, the Roketa page above says 120/70-12, but you do whatever you want.