Manufacturers / Cobra / OPTM Max-K Driver / Compatible shafts
Sleeve fitCobra OPTM Max-K Driver compatible shafts
The OPTM Max-K Driver uses the Cobra FutureFit33 adapter (Cobra connector system), FutureFit33 (DS-Adapt to OPTM, 2025 to present) (0.335" tip).
Check your shaft
Type the model your shaft is currently in (or was pulled from) to see whether it fits the OPTM Max-K Driver.
Drops straight in
Both use the , " tip. No reshaft, no builder. Re-check your loft position after the swap.
Fits, after an adapter swap
Not a drop-in. This shaft carries a ; the OPTM Max-K Driver needs a . The shaft itself works: a club builder swaps the adapter for a small shop fee.
The shaft's " tip differs from this head's " tip, so the builder may need to re-tip it; it may not be a clean swap.
Does not fit
Fits, after an adapter install
That shaft has no adapter, it is glued into a fixed hosel. A club builder can cut it and install a adapter to make it fit this head.
Fit unknown
We have not verified that model's hosel hardware yet, so we cannot say whether its shaft carries an adapter or is glued in. Treat this combination as unknown rather than assuming a fit.
Not in our catalog
That model is not in our catalog yet. Report it so we can add it, rather than guess.
Sleeve interchange
Researched cases where a sleeve from another generation of this same brand does or does not fit this head.
| Sleeve family | Verdict | Notes | Source |
|---|---|---|---|
| Cobra MyFly8 (with SmartPad) | Does not fit | FutureFit33 factory sleeve does not accept, and is not accepted by, a MyFly8-era head. | Inferred from aftermarket sleeve part coverage, cross-checked across suppliers. |
Shafts that drop in from another head
A shaft pulled from any of these heads carries a sleeve the OPTM Max-K Driver accepts, so it drops straight in, no reshaft.
- Cobra DS-Adapt LS Driver
- Cobra DS-Adapt LS Fairway
- Cobra DS-Adapt Max Fairway
- Cobra DS-Adapt Max-D Driver
- Cobra DS-Adapt Max-K Driver
- Cobra DS-Adapt X Driver
- Cobra DS-Adapt X Fairway
- Cobra OPTM LS Driver
- Cobra OPTM LS Titanium Fairway
- Cobra OPTM Max Fairway
- Cobra OPTM Max-D Driver
- Cobra OPTM X Driver
- Cobra OPTM X Fairway
Stock shafts
- Mitsubishi Chemical Kai'li Dark Waves Blue 66 g, S flex Mitsubishi Kai'li Dark Waves Blue 60 (Stiff, 66g) is one of Cobra's no-upcharge stock shaft choices for the OPTM MAX-K driver at the 9 and 10.5 degree lofts.
- Mitsubishi Chemical Kai'li Dark Waves White 68 g, S flex Mitsubishi Kai'li Dark Waves White 60 (Stiff, 68g) is one of Cobra's no-upcharge stock shaft choices for the OPTM MAX-K driver at the 9 degree loft.
- Project X Denali Blue Frost CB 67 g, S flex Project X Denali Blue Frost CB 60 (Stiff, 67g) is one of Cobra's no-upcharge stock shaft choices for the OPTM MAX-K driver at the 9.0 and 10.5 degree lofts.
Any 0.335 inch tip shaft can be built for this hosel by a club builder; the sleeve, not the shaft model, is what decides whether a used pull drops in.
Shafts from other brands
Sleeve adapters are brand specific. A shaft pulled from a different brand's head carries that brand's sleeve, not this one, so it needs the sleeve swapped by a club builder before it fits this head.
Fit from FUTUREFIT33 - COBRA Golf.
Adapter settings chart: what every position does
Thanks. We verify every report against a source before updating the data.
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