sku # ST-ZON113550
Columbus Zona 29er externally butted seat tube for steel bicycle frames - 28.6 dia. - .8/.6/1.2 wall thickness. Length = 550
310g - Weight is based on a representative tube. Actual weight may vary slightly.
Please see tube graphic (in the image gallery for this product) as a guide for the following specs.
OD=28.6 W1=.8* WC=.6 W2=1.2 L1=245 T1=40 LC=150 T2=40 L2=75
* Thickness can be 1.05mm in the first 15mm of W1