Double Butted frames

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RedBike

New Member
Location
Beside the road
The tubes are thicker at the ends than in the middle.
In basically means the frame will be lighter.
 

Tim Bennet.

Entirely Average Member
Location
S of Kendal
The 'walls' of the tubes are thicker at the ends. You'll see no difference externally.

The ends of the tubes are more highly stressed and in the case of aluminium, it also compensates for the loss of strength in the welding process.
 
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