The Kyosho W-5631 parts bag contains the H-pin type narrow width front tires for the Lazer ZX.
The are available in ‘S’ (soft), ‘M’ (medium) and ‘H’ (hard) versions. Note that the compound is not indicated on the tires themselves. The ‘high traction’ versions even received a W-5601 part number on the package, while still retaining the W-5631 marking on the tires.
