While there are several differences between our 4 StreetStrider models, the biggest difference between the 3i, 7i, 8s, and 11s models are the range of gears and the frames.
Gears. On our 3i, you will be able to cruise at 15-20 mph in gear 3 and climb moderate hills in gear 1. On our 7i, you will be able to achieve a much wider range of workout intensities in gears 6 and 7 and climb steep hills in gears 1 and 2. With the 8s you can cruise at 15-20 mph in gears 6 – 8 and climb steep hills in gears 1 and 2. With the 8s, each gear shift changes the ratio by about 17%, so with 8 gears, you can find the perfect resistance level for your stride. The 11s offers the largest gear range and top speed. Cruise at 15 – 20+ mph in gears 8-11 and climb steep hills in gears 1-3. Each gear shift changes gear ratio by -13% so you can find the perfect resistance level for your stride. The 3i, 7i, and 8s all feature the Shimano Nexus twist grip shifter while the 11s features the Shimano Alfine 11-speed transmission with Di2 electronic shifting system for a 409% gear range.
Frames. The 3i and 7i frames are built with high tensile steel, supporting riders up to 300 lbs. The 8s and 11s are built with our 4th generation aluminum alloy frame that weighs only 20 lbs and supports riders up to 300 lbs. All models now feature our new quick-release crank arm for easy transportation and storage, and the 8s and 11s models feature a new user-adjustable caster angle, providing the option for more upright stability for beginners or more leaning performance for experienced riders.
To learn more about the 4 different StreetStrider models, check out our compare models page found here: https://www.streetstrider.com/streetstriders.html