Frame Technology

Understanding Frame Efficiency

Butted Tubing
Tubing Refinements
Relative Weight Index


The IsoGrid® Story




1. Evolution™-sized head tube – Instead of a too-small head tube with innocuous machined edges, Santana’s head tube gets its strength from a diameter that allows stronger Evolution (1-1/4") sized headset, fork and front stem.

2. Integral cable adjusters – Santana designed special braze-ons and moved the adjusters up front to allow captains to fine-tune derailleur indexing and rear braking—easily and comfortably, while riding.

3. Easy-adjusting eccentric – Santana’s elegant one-piece eccentric allows quick, easy and precise chain retensioning with a lightweight pin tool and 4mm allen wrench. You’ll never use a hammer or pry bar again.

4. Round top and lateral tubes – Some builders ovalize top and lateral tubes even though torsional rigidity in these areas is essential. Tests prove these misplaced ovals add weight and rob performance.

5. Rack and fender capability – Santana installs threaded fittings for attaching front and rear racks and fenders. Steel forks include mid-fork through-bolt braze-ons that accept the stiffer, lighter and more secure Custom Lowrider rack from Tubus. Carbon-V forks accept standard lowrider racks.

6. 160mm frame spacing – Because “dishless” (symmetric) wheels with widely separated flanges are 30-80% stronger, Santana’s frames are built to accommodate them. Further, 160mm spacing offers improved shifting, and clearance for today’s large discs and tomorrow’s 11th cog.

7. Disc brake ready – To add a disc brake to other tandems you can spend hundreds to modify your frame and buy a new wheel. By contrast, Santana tandems that don’t already have a disc or drum are ready—with the correct hub, frame clearance and Santana’s versatile platform-style braze-on that facilitates easy installation of various brands of disc brakes or the venerable Arai drum brake.