The 2014-Current Tri Glides come with a variety of sizes based off the specific model bike. 

More Tri-Glides come stock with 16 x 3.5 Front wheels and 16 x 5 Rear Trike wheels. Some alternatively come with 17 x 3.5 or 19 x 3 front wheels. We offer all of these sizes. 

The most common sizes that people purchase are 21 x 3.25 front wheels that fit with fender risers and 18 x 7 Rear Trike wheels. These are a great size replacement and work really well and still ride great!