Please help and contribute some information about your vintage Lotus. It's okay to leave fields blank, except for the Serial Number and Model name. Please do not guess at your answers, if you are unsure of an answer please add a question mark or leave the field blank. You may re-submit additional information at any time and we will update the chart. We hope that collecting this information will eventually allow everyone to better understand the Lotus serial numbering code and how it relates to our bicycles.

Serial Number: Usually two letters and five numbers under the bottom bracket.

Model Name: The name Lotus called your bike, usually on the top tube.

Primary Frame Color: The main color of your bike. For fades you can list the colors.

FrameTubing Brand : As listed on the frame sticker, if it's still there.

Frame Size: Measured from the center of the bottom bracket to the top of the seat tube. Either in inches or centimeters is fine.

Seat Post Date: As outlined on the What year is it? page.

Seat Post Size: Marked on the post usually under the minimum insertion mark.

Alternate Component Date: Ideally, the newest part code you've found on your bike. See the What year is it? page.

Alternate Component Type: From what component did you get your date?

Model Year: This is the year that you think, or know, your bicycle was made.

Owner's Name: You can tell us your name if you'd like. (It won't be published).

Email Address: This form is returned to us anonymously, so unless you add your email we won't be able to send you a "thank you" or inform you if you've won our $1,000,000 grand prize drawing. Your contact information will help us if we have any additional questions about your bike.  We won't bother you unless it's important.

Comments: We'd love to hear any other information that you think is relevant, or not.

Thanks for your help!