Hoyt Carbon RX-10 Mod Chart — All 21 Draw Lengths

Hoyt publishes the Carbon RX-10 draw length chart openly, and it is the thing everybody is actually looking for when they search “RX-10 mod chart”. Here it is, all 21 rows, transcribed from Hoyt's own chart on 10 September 2026.

Short version: the RX-10 runs the HBX Gen 4 cam, one base cam size, and covers 25 inches to 30 inches in quarter-inch steps. Five modules — 1 through 5 — and eleven module positions, written as A through K for the whole-and-half inches and lowercase a through j for the quarter steps. Each module covers a one-inch span in four quarter-inch positions.

Hoyt Carbon RX-10 draw length chart

Source: hoyt.com — Carbon RX-10 Draw Length Chart, read 10 September 2026. Reproduced with attribution. If Hoyt revises it, this page is wrong until we fix it — tell us at sal@sparrowexpeditions.com.

How to read it

Two things trip people up.

The case matters. Position A and position a are different holes, a quarter of an inch apart. Uppercase letters are the whole and half-inch settings, lowercase are the quarters between them. Read your existing setting off the module before you change anything, and read the case.

Mod number and position are two separate things. The mod is a physical part — you have to have the right one. The position is where that mod bolts on. Going from 29" to 28" means both a different mod (4 → 3) and a different position (C → E). Going from 29" to 28.5" is the same mod, one position over. If you are buying mods, count how many one-inch spans you are crossing, not how many quarter inches.

There is no bow press in this. RX-10 module changes are bolts, not limbs. Back the screws off, reseat at the new position, torque to Hoyt's spec, then re-check your draw length on a bow scale rather than trusting the letter.

What changing draw length does to your arrow

This is the part the mod chart cannot tell you, and it is the reason this page exists on an arrow site rather than a bow site.

Draw length is one of the four inputs that decides your spine, and it is not a small one. Moving an inch is worth roughly 3.5 lb of effective draw weight in spine terms, which is about a third of a spine class. Two inches will push you across a band. It also changes your arrow length if you re-cut, which is worth another 3.5 lb per inch, in the same direction — so a genuine short-draw setup can end up a full class off what the sticker weight suggests.

And every sight mark moves. A draw-length change alters your anchor, your speed and your peep height at once; the tape you printed last month is a tape for a bow you no longer own.

• Hoyt Carbon RX-10 arrow setup — spine, weight, speed and components for this bow
• Arrow spine calculator — put your new draw length in and see the spine move
• Make a new sight tape — after a mod change, from your own chronograph numbers
• The Forge — the whole workshop, free to start

Frequently asked

What draw lengths does the Hoyt Carbon RX-10 cover?

25 inches to 30 inches, in quarter-inch increments, on the HBX Gen 4 cam. There is one base cam size; the range is covered by five modules in eleven positions.

Which mod do I need for a 29-inch draw on an RX-10?

Mod 4, position C. 28.75" is the same mod at position c, 28.5" is mod 4 at D, and 29.25" steps up to mod 5 at position b.

Do I need a bow press to change RX-10 mods?

No. The module bolts to the cam; you do not need to come off the string. Use Hoyt's torque spec and verify the resulting draw length on a scale rather than assuming the letter is honest.

Where is the Mathews ARC mod chart?

Mathews does not publish one. Every ARC mod chart circulating online is a scan of a document stamped “authorized Mathews archery retailers only — confidential information”, and we will not reprint those. What Mathews does publish is the draw-length range, which is on our ARC 30 and ARC 34 pages. For the module number, ask your dealer — it is a five-minute job on their press and they will check your actual draw length while the bow is in it.