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Columbus Zona 29er externally butted seat tube - 28.6 dia. - .8/.6/1.2 - length = 550

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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