We wash BIKES too! We are a car wash, but we ensure that our soaps are safe on bikes as well. Here are some tips for washing a bike at the car wash:
1- DON'T put the nozzle too close to your bike, especially bearings and suspension components. 2' back is generally safe.
2- Use the High pressure wash soap first. This will likely be the only soap you need. Chances are that you don't need the power of the presoak unless your bike was on the back of your car on I-70 in winter...
3- Use the high pressure rinse after the soap and you are almost done! Don't forget to lube your bike after a wash, every time.
(For best shine hand dry)
*Clean bike, happy rider.