I'm thinking of going with a performance machines 21 up front 18's in rear any thoughts or suggestions??wondering how they'll handle.thanks

 

i can't believe in the trike world.nobody has done a 21 inch wheel??

 

I'm guessing the larger diameter front wheel would affect the steering, I would think it would make it less difficult to turn. I don't understand all I know about rake, trail and any of the other terms. I'd contact a rake kit specialist to get some straight skinny. I'm also guessing the larger rear wheels would affect it too.

 

http://sstrikes.com/?page_id=318

 

I have a 2014 Tri Glide installed 21" Front Tire, replaced front fender with Street Glide Fender. Rear rims power coated black but keep the original size tires. It is more difficult to push through curves with this set up. Considering a lift kit but I like the looks with the way it sets.

 

Great looking Trike I especially like the paint and graphics.

 

What more is there to say nice really nice! ride safely fearless

 

My 2010 has a 21". Kept the rear stock and powder coated.
I don't notice any difference in the steering.

 

Fuzz,all else being equal,a larger diameter front wheel will be harder to turn due to the increased gyroscopic effect. Triple trees with less rake would be needed for easier steering.
Taller diameter rear wheels will require a shorter sidewall (lower aspect ratio) tire if you plan to keep the same tire height,for gearing and speedo calibration purposes. One of the downsides of shorter,stiffer sidewall tires is a harsher ride quality.