OP
@gummy8879 avatar
UTC

Enthusiast
2009 Stella, 2001 Honda Helix
Joined: UTC
Posts: 85
Location: Memphis, TN
 
Enthusiast
@gummy8879 avatar
2009 Stella, 2001 Honda Helix
Joined: UTC
Posts: 85
Location: Memphis, TN
UTC quote
On motorcycles, the front tire has the sipes facing upward when looking at the bike head-on, and the rear tire has them facing upward when looking at it from the back. Therefore the treads are facing opposite directions.

Of course these scooters have the same tire size front and back, and the tires (to my knowledge) only have 1 indicated rolling direction. But in the case of my BGM Sport tires, which have sipes in a similar shape to sporty motorcycle tires, shouldn't I mount the front "backwards"?

The idea behind the "reversed tread" on motorcycles is that when the rear tire is gripping hardest (under acceleration), the tire material is being pushed backwards on the road relative to the bike (as the tire wants to spin forward). The opposite is true for the front tire, as under braking the tire is being pushed forward onto the road (not being spun backwards obviously but the wheel is trying to stop turning). With the sipes oriented correctly, the forces enacted push the tread grooves closed instead of pulling them open.

Thoughts?
@roland87 avatar
UTC

Molto Verboso
'13 LML Star 200, '81 50 Special, '81 P 150 X, '87 PK 50 Nuova, '84 PK 50 S
Joined: UTC
Posts: 1267
Location: Ukraine. Kyiv.
 
Molto Verboso
@roland87 avatar
'13 LML Star 200, '81 50 Special, '81 P 150 X, '87 PK 50 Nuova, '84 PK 50 S
Joined: UTC
Posts: 1267
Location: Ukraine. Kyiv.
UTC quote
Just follow the rotation direction arrows on your tires. Some of them have arrows in opposed positions for rear and front wheels, for example Pirelli Scooter Angel. And some have same direction for both wheels like Dunlop ScootSmart or Michelin S1.


Opposed direction Pirelli Scooter Angel
External inline image provided by member with no explanatory text

Same direction Dunlop ScootSmart
External inline image provided by member with no explanatory text
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