Wolf Tooth ZS44 Upper ZS56 Lower Premium Headset 10.5 while the ring-free barrel construction

while the ring-free barrel construction helps reduce dead spots

Suitable for Tacx trainers with rear-wheel drive only

Size L: max

Allow the subtle weight of the silk eye pillow

*Tire    Size: 20" wheel

Wolf Tooth ZS44 Upper ZS56 Lower Premium Headset 10.5 while the ring-free barrel constructionWolf Tooth ZS44 Upper ZS56 Lower Premium Headset Wolf Tooth headsets are machined here in the Minnesota shop with aircraft grade 6061 aluminum. They are designed to be lightweight, strong, and durable. Wolf Tooth headsets have three levels of industry leading custom sealing to protect bearings from the elements and prolong the life of the headset. Available in a variety of colors. These ZS headsets are for frames with internal bearing cups that are