Thread: Your Dynafit Titan Ultralight Mods

G/Flex over Pebax is a success (only for large coverage areas). I made wood dowel and carbon fibre tests on the inside of the cuff and the G/Flex does not adhere to Pebax very well. It works with PU plastic (most ski boots) but not High Module Pebax (Titan cuff). To coat a larger area with nothing attached works fine.

Good news. Freesole Urethane (same stuff Hoji recommended) does adhere to the Pebax quite well (very well). ShoeGoo works a little but not even close to as good as Freesole.

I will be re-testing with Freesole:

1 Freesole as a primer coat. Then sanded 80 grit with G/Flex used to adhere wood dowels. (The wood pull test. Will the wood rip apart and/or will glue be left on the cuff and wood. Yes= good bond.)

2 Freesole used to bond the first layer of Carbon Fibre. Then sanded (80 grit) and subsequent layers with G/Flex.

3 Freesole used as primer coat. Then sanded and G/Flex used to adhere all the Carbon Fibre.

Test 1 is being done on the inside of the cuff to ensure the G/Flex -to- Freesole bond is good.

Tests 2 and 3 are being done on a larger PU plasrtic ski boot cuff to check for stress results when I try to break it by bending.

The original goal was to reinforce the upper in places with some try-weave carbon fibre. That was abandoned after determining the CF was too fiddly to work with.

Finally put it back together. Taking it apart was stupid ... but fun nevertheless. The upper is a little stiffer now, say 15% to 20%, and also has some improved hardware.

This was waay too much work. I'm sure they will ski great. Vulcans probably still stiffer. But they do have a nice progressive flex and the top part of the upper does not collapse so easily under forward shin pressure.

* The entire upper was abraided and coated, twice inside and twice outside, with G/Flex epoxy.
* The buckles are now backed by t-nuts instead of rivets.
* The ankles are now bolted (with canting adjustment) instead of the stock rivets.
* The composite plate at the back is PU glued to the upper.