This is the Hobby Products International (HPI) M Compound Radial|
Tires Wide (31mm) Width for Touring Cars and Sedans.
Radial Tread and Medium "M" Compound
Fits Touring type cars from Kyosho, Tamiya, Yokomo
and the HPI RS4 using standard width wheels
Fits Wide (31mm) Width Wheels
Two Radial M Compound Wide Tires
Two Grey Foam Insert Strips
Outside Diamter: 2-9/16" (2.5") (65mm)
Inside Diamter: 1-15/16" (1.9") (49mm)
Width: 1-3/16" (1.2") (31mm)
Glueing Tires to Wheels with CA Glue Such as GPMR6001.
Glueing the Foam Insert Strip with Contact Cement
31mm Width Wheels .
Writing on the sidewall says "HPI and Japan" on both sides.
Other versions available:
HPIC4512 4512 M Compound Radial Standard Width
HPIC4540 4540 Super(Soft) Compound V-Groove Standard Width
HPIC4415 4415 Pro(Very Soft) Compound Slick Belted Standard Width