Bianchi identification
 

Hello! I've got an old red Bianchi bike I'd love some help identifying.

Here's everything I know:
- Dia Campe brakes
- Suntour Arcx derailleurs
- ambrosio wheels
- Suntour
- Has a piaggio logo on it
- Single serial number on the bottom bracket
- Hi-mg sticker also on the bike
- suzue hubs
- SR Stem

Any help would be great. Thank you!

Almost definitely of Japanese origin.
Post the serial number and seat post outer diameter.

SpencerG as mentioned likely Japanese/Tiawanese in origin, and is likely something like a '82-84ish Classica, Special, or Sport SS. Do you have any pics? You should be able to upload them to an album so we can look at the them

LS290266.

The seat post is 28mm but my measuring is pretty suspect so might be off by 1-2mm

Thanks!

Seatpost diameters are in increments of 0.2 mm so being off by 1 mm is a lot. You need a caliper to measure it accurately. You can't match it up to a ruler.

As mentioned, you need calipers to measure it precisely. OTOH, most seat posts have the diameter stamped into the metal near the bottom of the post. You can probably just pull the seat post out and look for the number.