My kid's scooter had a wobbly rear wheel and I couldn't figure out why until I noticed the old spacer was worn down. Dropped this 3.4mm one in and the wheel spins straight again, no more rattling on the sidewalk. Cheap fix that saved me from buying a whole new scooter.
Charlotte K.★★★★★
Wasn't sure a 3.4mm spacer would make any difference but the rear wheel wobble on our Compact is completely gone now. Popped it in during a tire swap and it seated perfectly, no trimming needed. Feels like the scooter rolls smoother than when we bought it.
David K.★★★★☆
Fit my daughter's Sprite rear wheel perfectly and took about two minutes to swap in. Only gripe is that 3.4mm was just barely the right thickness for our axle, so measure before ordering.