Q: I bought an ’88 DX-4000 recently but it needs a seat post. Can you tell me the correct size?

A: The 1988 DX-4000 should have a 26.8 seat post.

In the future we’ll add more models and sizes here.

• 1989 DX-1000 seat post size (Tange 900 tubing)  -  26.6 mm
• 1989 PICS Team Custom (Tange Prestige tubing) – 27.2 mm
• 1988 DX-4000 seat post size (Tange 1 tubing)   – 26.8