GiantEV wrote:You may want to consider 16" moped tires for your front wheels to match your big rear wheel. 16" tires fit on wide 20" bicycle rims. I run Shinko 714 2.25-16 moped tires and love them. The key is to make sure your rim is wide enough for some of these tires.
Sounds like a good idea to me.
Can you link a picture of your bike using those tire?
I'm using these tires on front and rear of my A2B metro bike, and front wheel of my recumbent bike. I am selling my two trikes without motors so I don't have any pictures, but I was only running this same tire on the rear wheel with the motor. The front tires were good bicycle tires, but they still would get flats and I'd have to fill them with air once or twice a week. With my Shinko moped tires I can go a month or two without losing tire pressure, and I've yet to get a flat on any of my bikes using that tire. I ride on streets with glass and other debris, as well as nasty thorns that eat up tires, so a reliable tire is important to me than rolling resistance.
I'm planning on building a full-suspension trike in the future, at which point I'll use these tires on the front with some Alex DX32 rims. I've never had these tires on the front of my trikes, just the rear, but based on my good experience with these moped tires I'm a convert.
I realize that these moped tires won't have as good of rolling resistance as a bicycle tire, but I'm willing to trade durability for rolling resistance. I've even entertained the idea of running 17" or 18" motorcycle wheels on the front of the trike I want to build since I'd like to see how well a trike could do on some mild offroading.