Mathews Phase4 29 Specs and Mod Chart
The Mathews Phase4 29 (2023) publishes a 340 fps IBO rating, 29 in axle to axle, a 6 in brace height, a draw length range of 25.5 to 30 in and 60 to 75 lb of draw weight. The bow the Lift replaced, and still one of the quietest flagship hunting bows made thanks to its resistance-phase damping.
Full published specifications for the Mathews Phase4 29, a 2023 model, along with how its draw length adjusts and who the bow actually suits. Every figure below comes from manufacturer published data, cross-checked against major retailer specification tables where a manufacturer page has been retired.
Mathews Phase4 29 specifications
| Specification | Published value |
|---|---|
| Brand | Mathews |
| Model | Phase4 29 |
| Model year | 2023 |
| IBO / ATA speed rating | 340 fps |
| Axle to axle | 29 in |
| Brace height | 6 in |
| Draw weight range | 60 to 75 lb |
| Draw length range | 25.5 to 30 in |
| Let-off | 80% or 85%, set by the module |
| Mass weight | 4.48 lb |
| Production status | Discontinued |
Specifications come from manufacturer published data and are provided for reference. Bows are occasionally revised within a model year and published figures carry manufacturing tolerances, so confirm the exact numbers with a dealer or a pro shop before ordering arrows or accessories.
Draw length modules and how adjustment works
SwitchWeight modules, swapped with two Allen bolts and no bow press. Each module sets draw length, peak weight, and let-off.
The published range is 25.5 to 30 in , which is 4.5 inches of total adjustment. That range is the single most important number on this page, because a bow set outside your correct draw length cannot be tuned into fitting. If the bow is at the extreme end of its range for you, look at a different model rather than living with it.
Three terms get used loosely and mean different things. A rotating module stays on the cam and is unbolted, turned to a new setting, and re-tightened, which you can do at home with a hex wrench. A module swap means buying a different module for the draw length you want, still usually without a press. A cam change means a new cam and a press visit. Check which applies before assuming a used bow will fit you.
Measure your draw length before you shop, not after. The wingspan method is wingspan in inches / 2.5, rounded to the nearest half inch, and our draw length calculator runs it with a sanity check. Have the result confirmed at a shop with your actual release aid, because switching between a wrist strap and a handheld release changes effective draw length by roughly a quarter to a half inch.
What the speed rating really means
The 340 fps figure is an IBO rating, measured at a 30 inch draw length, 70 pounds of draw weight, and a 350 grain arrow. Almost nobody shoots that combination, so treat the number as a way to compare bows against each other rather than as a speed you will see on a chronograph.
As a worked example, a shooter at a 28 inch draw, 60 pounds, with a 425 grain hunting arrow would expect roughly 275 fps from this bow. That estimate applies the standard corrections of about 10 fps per inch of draw under 30, about 2 fps per pound under 70, and about 1 fps per 3 grains of arrow over 350. String accessories such as a peep and a nock set cost a few more. Run your own build through the arrow speed calculator and chronograph it if you need a number you can sight in against.
Who the Mathews Phase4 29 suits
- Used buyers who want flagship damping and do not care about the newest model year.
- Treestand hunters who prioritise a quiet shot over mass weight.
- Heavier than the Lift at 4.48 lb, which matters if you pack in long distances.
Brace height is the quiet forgiveness spec. At 6 in, this bow sits at the fast, unforgiving end, which rewards an established anchor and punishes form errors. Axle to axle length works alongside it: see short vs long axle to axle bows for how the two specs interact.
Setting up arrows for this bow
Arrow spine is driven by your draw weight, arrow length, point weight, and cam aggression, not by the bow model alone, so there is no single correct shaft for any bow. Run your actual numbers through the arrow spine calculator and check the result against the spine chart before ordering a dozen shafts. Remember that spine is dynamic: a heavier point or a longer shaft both weaken it.
Safety minimum. At this bow's 75 pound peak weight, total arrow weight must stay at or above 375 grains, which is the industry standard of 5 grains per pound of draw weight. Shooting lighter leaves too much stored energy in the limbs rather than the arrow, which risks damaging the bow and voids most warranties. Build your real total with the total arrow weight calculator, counting shaft, insert, point, nock, wrap, glue, and vanes. Have any setup work you are unsure about checked by a qualified pro shop.
Related reading
- Draw length calculator, the number to settle before you buy any bow
- Arrow spine calculator, cross-manufacturer rather than locked to one shaft brand
- Kinetic energy and momentum calculator
- All bow specs and mod charts
- Gear comparisons
Frequently asked questions
How fast is the Mathews Phase4 29?
Mathews rates the Phase4 29 at 340 fps IBO. That figure is measured at a 30 inch draw, 70 pounds, and a 350 grain arrow, which is faster than almost anyone actually shoots. Expect roughly 10 fps less for every inch of draw under 30, about 2 fps less per pound under 70, and about 1 fps less for every 3 grains of arrow over 350. A typical hunting setup lands well below the published number.
What is the draw length range on the Mathews Phase4 29?
The Phase4 29 covers 25.5 to 30 in, a span of 4.5 inches. SwitchWeight modules, swapped with two Allen bolts and no bow press. Each module sets draw length, peak weight, and let-off. Measure your own draw length before you shop, because a bow set outside your correct length will never anchor consistently no matter how well the rest of the setup is tuned.
What draw weight does the Mathews Phase4 29 come in?
Published draw weight is 60 to 75 lb. Discrete peak weights of 60, 65, 70, and 75 lb. Choose the weight you can draw smoothly while seated and without raising the bow above your head, not the highest number you can muscle once. Overbowing is the most common setup mistake in archery, and it damages form long before it damages anything else.
What is the minimum arrow weight for the Mathews Phase4 29?
At its 75 pound peak weight, the hard floor is 375 grains total arrow weight, based on the industry minimum of 5 grains per pound of draw weight. Going lighter leaves too much energy in the limbs rather than the arrow, which risks cracking limbs or cams and voids most warranties. Check the bow's own documentation as well, since some manufacturers set a higher minimum.
Is the Mathews Phase4 29 still in production?
No, the Phase4 29 has been discontinued and is no longer in Mathews's current lineup. It remains common on the used market, which is exactly why the specs matter. If you buy used, budget for a string and cable inspection, since strings age whether or not the bow has been shot.
How we choose: we compare published manufacturer specifications, verified owner reviews, and pro shop guidance. We do not test gear in person. Draw weight and arrow spine affect safety, so follow your bow manufacturer's specifications and have setup work checked by a qualified pro shop.