So, the dips you see are increases in hoop stiffness. The lower the number, the less oval deformation I measured. Hoop stiffness relates to the shaft ovalizing. This is hoop stiffness, not bend stiffness.
The less deflection, the stiffer that area of the shaft is. This graphic shows hoop deflection measurements. near the tip, where the wall of the shaft are thick, the hoop stiffness is high. Hoop stiffness is a function of wall thickness. At that point, an ultra high modulus hoop ply was added to preserve shaft stability. If you look at the EI curves you will see this is where the shaft is quickly descending in stiffness. A significant ‘bump’ of hoop stiffness in the high midsection of the shaft. We can see the research done on the 3D ENSO system shaping the butt to create softer handles.Īn interesting aspect of these shafts stood out during hoop stiffness testing. The Speeder Evolution is a classical design, mid soft in relation to a stiffer butt and tip.This design is a good fit for the majority of golfers. The technical discussion and measurements are available only to registered readers Lets take a look at the profiles, they vary by model: The raw shafts are 47″ long, not the typical 46″. The weights and stiffness ascend from a 4″ deflection yielding 5.8 lbs for the 474R2, and 8.6 lbs for the 79 gram 757X. The Speeder 474 R2 weighs 48 grams uncut. As the weight increases so does the stiffness. Like all of the Speeder models from Fujikura the profiles are consistent throughout the model. As you can see in this illustration, the tip is stiffer and there is a tip-mid stiffness adjustment as part of the design update.
Speeder 757 evolution driver#
It is designed to handle the heavier driver heads we are now seeing. The Fujikura Speeder Evolution came to the golfing public in 2015. In late 2013 the Speeder brand was reintroduced with 8 shafts, numbered like the original Speeder. It was brought back a few years ago as the Motore Speeder, a complex matrix of 26 shafts, featuring 3 launch designs, each in an array of weight and flex. The Speeder brand name disappeared for many years. The Fujikura Speeder 757 was my introduction to premium driver shafts many years ago. Capturing the name ensures that the security of delivery is maintained whilst avoiding the need for the customer to physically sign.Fujikura Speeder Evolution Driver Shaft Russ Ryden, Golf Digest America’s 100 Best Clubfitter Where a safe place is not possible, couriers will still knock on the door but rather than asking for the customer to sign, couriers will ask the customer for their name, input this into their hand-held device and then write “Covid-19” in the signature box.Where a safe place is possible, couriers will deliver to that safe place, take a photo to confirm safe delivery and then provide the customer with a calling card stating that safe place.For those customers who do not divert, some couriers have put in place a temporary process for our signature deliveries which couriers will follow to ensure contact is minimised.We are encouraging all customers to use the alternative delivery options available to them myPlaces, Diversions and Safe Place for example, which means that they do not have to receive their parcel direct from the courier or sign for it.Strength of the shaft preventing ovalization creating solid stability
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