Grips say it’s a Mongoose. Crank says Tourney Tuf-neck USA. Only other markings I see are ‘112 83’ and ‘WALD 20’. Found it in the rafters of the garage I just bought. TIA!
Here are four things about your frame that make it distinctive.
- The rear dropout is horizontal rather than the track type as most double diamond BMX bikes have
- The seat stay bend connecting to the dropout.
- There seems to be a brace at the seat tube/top tube/seat stay junction. Not sure what that is but it is unusual.
- The gusset design, while similar to other BMX bikes it is unique in the details
I've done some searching but have not found a match yet. One of the best references is bmxmuseum.com.
Maybe these observations will help you find a match.
There is a Chainring tuf necks cranks 3 piece sugino tourney ano blue big, looks to have either redline or race Inc v bars big and a cheap Troxell vintage seat. (Everything described except the seat are really expensive parts.) Frame throws me, it looks like parts could be copied from a old vintage mongoose looptail. Wheels look steel with coaster brake but look for stamp near valve stem hole. I actually have a good set of ukai steel wheels (FE) blue off s very early goose with a bendix coaster.