Are there any city commuter step-thru ebikes with a twist throttle and thinner tires 1.95" - 2.25" and 700mm wheels sizes? I'm looking at the Rize City and the Biktrix Swift and they both have thumb throttles and 26" tires. I'm 66 years old and would like a step-thru. I use to ride a motorcycle so I'm more comfortable with a twist throttle. Thanks.