Description The Rennform is a precisely crafted 15-spoke wheel constructed with Forming Technology to ensure a lighter and stronger wheel. Finished in either Matte Grey the Rennform is available in 17×8”, 17×9”, 18×8”, 18×9”, 19×8.5” and 19×9.5” sizes. The Rennform has fitment for many popular passenger vehicles as well as European tuning vehicles alike.