You must have javascript enabled to use the Anvil tube calculator.

Tube Deflection Calculator

Unabashedly borrowed from anvilbikes.com

  D L L1 T1 L2 T2 L3  
mm   avg. ID
inches                
      W1   W2   W3 avg. wall
    mm      
    inches            
  mm inches   mm inches    
L of cut tube   You will remove     avg.wall mm  
Cut from L1   L1 Remaining butt     avg.wall inch  
Cut from L3     L3 Remaining butt     avg. ID  
Tube Strength Simple
Deflection@		 Torsional
Deflection@		    
Uncut lbs. in-lbs. E F
Steel     30,100,000 11,600,000
Aluminum     10,100,000 3,800,000
Titanium     16,000,000 6,500,000
Cut Simple
Deflection		 Torsional
Deflection		   MOI
Steel     Uncut  
Aluminum     Cut  
Titanium      
Tube Weight Uncut Cut
Steel    
Aluminum    
Titanium