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The raw uncut length is 45 inches, so when fitted to a driver head, the shaft length comes to about 46.5~47 inches. There is no ideal length and the butt end can be trimmed to make any total driver length depending on the individual golfer preference (between 44~47 inches).

No. The Autoflex shaft was not intended to be only used as a long drive shaft. Rather, Dumina Co. intended the shaft to help make the game of golf easier by helping slow an average swing speed golfers swing faster without swinging harder. Having said that, the Autoflex shaft line-up can cover from 65mph to 140+mph swing speeds and is used in long drive competition.

Here are the updated tipping/trimming instructions for AutoFlex shafts;

Driver - No tip trim. Cut from butt end only.

3 wood - No tip trim. Cut from butt end only
5 wood - Tip trim 0.5 inch. Cut butt end to desired length.
7 wood - Tip trim 1 inch. Cut butt end to desired length.
3 hybrid - No tip trim. Cut butt to length.
4 hybrid - No tip trim. Cut butt to length.
5 hybrid - 0.5 inch tip trim. Cut butt to length.
3 iron - No tip trim. Cut from butt only.
4 iron - No tip trim. Cut from butt only.
5 iron - Tip 0.5 inch. Cut butt to length.
6 iron - Tip 1 inch. Cut butt to length.
7 iron - Tip 1.5 inch. Cut butt to length.
8 iron - Tip trim 2 inches. Cut butt to length.
9 iron - Tip trim 2.5 inches. Cut butt to length.
PW, GW, SW - Tip trim 3 inches. Cut butt to length.

No putter shaft is manufactured.

The recommended swing weight for woods is between D0~D2, for irons between D0~D1, and for wedges between D1~D2.

The unique characteristics of Autoflex shafts make it lighter than conventional shafts with a much lower cycles per minute. Due to the more flexible nature, a higher swing weight may cause the club head to wobble on the downswing transition. This may result in an off-centre impact for loss of distance and accuracy. A swing weight of D1 is found to be good for many golfers, but some have seen excellent results at D0 and even up to D3~D4 (for sf505x and xx shafts). Try various swing weight configurations to see what is optimal for you and your swing type. 

Counter balancing the grip end can help achieve the swing weight, and it may be helpful to some degree (ie. If the swing weight only needs to decrease by 1 point). However, if the swing weight is too high, adding weight to the butt end increases overall driver weight. Also, the club head will still be too heavy despite the “correct swing weight”, so it may still move too much during the swing. It is better to see if your driver head has inter-changeable weight kit with lower weights. Also, some golfers have mentioned filing down their current weight.

Most golfers that have seen success with Autoflex have reported higher launch angles. This is due to the lower cycles per minute (flexible) shaft kicking at impact for an uptick in dynamic loft.

Thus, the higher ball flight is not due to an increase in back spin, but higher launch angle. So the higher launch angle coupled with low spin will provide more carry distance with roll distance.

Choose the shaft model depending on your goals. For example, if you are averaging 98mph driver swing speed, both the sSF405 (85~100mph) and SF505 (95~105mph) would be suitable.

Choose SF405 if: you are looking to maintain the current average speed, or swing smoothly without strain.

Choose SF505 if: you are a more aggressive in your backswing and transition; or looking to swing harder to increase overall swing speed.

The intent of the manufacturer was for a shaft to provide distance and accuracy with a smooth swing; and not maximum effort with every swing.

CAUTION: High swing speed golfers should not attempt to swing lower spec Autoflex shafts that are more flexible. It may cause the shaft to bend and fracture if swung too hard. (i.e. SS 110+ mph golfer should not try to swing the SF305X or the SF405 hard.)

As with most tech enhancement features from golf manufacturers, Golfers with higher swing speeds tend to see bigger increase in club head/ball speed and distance.

For drivers, golfers below 100mph swing speed tend to see on average 2~4mph faster and 5~10 yards longer, while 110+ mph golfers report average gains of 3~10mph and 10~25 yards, respectively.

Remember that all golfers are different with varying angle of attack and swing mechanics. Fitting the Autoflex shaft to best suit your particular swing style is recommended for best results. Just like any product with an instruction manual, the Autoflex shaft works best at recommended swing weight with the smooth take away and transition. It is not designed to magically fit all swing types, but will help golfers to swing at a more smooth tempo.

First thing to check is to see if you are impacting the center of the clubface. Autoflex does not guarantee a center strike every time. If it seems that you are way off the sweet spot, be sure to check your swing weight (swing balance) to see if the head feels too heavy. As mentioned above, Dumina recommends swing weight between D0~D2, with SF305 and SF405 being closer to D0~D1. But if you do not see distance gains and way off-center dispersions (inconsistent impacts), then try to further lessen the swing weight. Some 110+mph hitters have reported that D0 (even C8) swing weight stabilized the head even more for speed and accuracy. Next, check your angle of attack to see if you are in the negative loft. Unless you have a faster swing speed (in excess of 110mph), a positive angle of attack will be more beneficial in getting the ball up in the air with less back spin. In hitting up on the ball, some found that moving the ball an inch or two toward the left foot at address helps to hit up and create a positive angle of attack.Lastly, check to make sure the shaft is not cracked or splintered. If damaged, the shaft may not be able to deliver the proper load and release on impact. 

If the shaft is suspected of damage or breaks during course of normal play within 1 year of purchase, please contact us and we can begin the inspection/replacement process.