Single vs Dual Cam Compound Bows: Which System to Buy

Most archers asking "single or dual cam?" are answering a question from 2005. The market moved on. Binary and hybrid systems now sit on nearly every flagship hunting bow, and the short answer is this: buy one of those unless you have a specific reason not to. The usual reasons are budget, or a genuine hatred of bow shops.

But the old labels still get thrown around, and the differences are real. They come down to two things — how much tuning the system demands from you over its life, and how cleanly it pushes the arrow off the string.

That second one is called nock travel: the path the nocking point takes through the power stroke. Ideal travel is dead straight and level. Any vertical hop or sideways kick at release shows up downrange as porpoising or fishtailing arrows, no matter how good your form is.

Single cam

A single cam puts one asymmetric cam on the bottom limb and a round idler wheel up top. There's nothing to synchronize because only one part is doing the work. Mathews built an empire on this design in the 1990s with the Solocam, and it's still the system you'll find on most entry-level hunting bows.

The appeal is low maintenance. Single cams stay in tune longer, shoot quiet, and produce very little hand shock. Set it up once and mostly forget it.

The trade-off is geometry. Because the top and bottom of the system aren't symmetrical, nock travel can wander — the idler feeds string differently than the cam pulls it, which can push arrows high or low. You can tune most of it out, but you're working against the design rather than with it. Single cams are also the slowest of the four systems. If you shoot thirty arrows a season at whitetail distances, none of that matters much.

Twin cam

Dual cams flip the logic: two identical cams, one on each limb, linked by cables. When they're perfectly synchronized, the string lifts off both cams at exactly the same rate and you get genuinely straight, level nock travel — plus more speed than a single cam can manage. Target archers loved them for decades for exactly this reason.

The catch is in the word "when." Each cam rotates independently, so string creep, cable stretch, and plain age pull them out of time. A detuned twin cam accelerates the string unevenly and your groups open up. A high-end twin-cam rig can need re-timing as often as every few months to hold critical accuracy.

Fine if you own a bow press and enjoy the work. Annoying if you don't.

Hybrid cam

Hoyt split the difference in the early 2000s with the Cam & ½ — a power cam on the bottom and a near-identical control cam on top, in place of the idler wheel. The pitch: single-cam practicality with most of a twin cam's speed.

It largely delivers. A hybrid needs synchronizing at setup, but once dialed it's easy to live with and holds its tune well. Nock travel issues do crop up occasionally, though they're uncommon and usually tune out with patience. The Hoyt Carbon RX-10 and Hoyt Alpha AX-3 33 both carry this lineage forward.

Binary cam

In 2005, Bowtech introduced something different. Engineer Craig Yehle's design — patented in December 2007, with royalties paid to Rex Darlington of Darton Archery — slaved the two cams to each other instead of to the limbs. Cam-to-cam cables mean the cams physically cannot rotate out of sync. If a string stretches or one limb deflects slightly more than the other, the free-floating system equalizes the difference on its own.

The practical result: a binary cam bow never needs cam-timing tuning. You keep twin-cam speed and level nock travel without the maintenance schedule, which is why most manufacturers have moved to slaved-cam designs in some form.

There's one known weakness. Binary systems can develop cam lean — string tension pulling a cam sideways — and it can be fiddly to fix. Makers attack it differently. Prime splits the bowstring across two parallel cam tracks on the Prime Divide 33 to balance the load. Bowtech's DeadLock system on the Bowtech Alliance 30 takes the opposite approach: you slide the cam laterally with a screw, no bow press needed, until your arrow tears clean.

Where our scored bows land

Every compound we've scored runs a slaved or hybrid system — no true single cams, no old-school twins. That's not selection bias. It's just where flagship bows are in 2026.

The Bowtech Alliance 30 is the purest binary expression of the group, rated at 338 fps with the brand's tool-free lateral cam tuning. The Mathews ARC 30 and Mathews ARC 34 run the SWX-2 cam with swappable mods — SWX for speed, SWX-Z for a softer draw curve — so one bow covers two personalities. The Prime Divide 33 is the cam-lean skeptic's pick. Across the whole field, IBO ratings span 338 to 357 fps and prices run $1,300 to $2,149, and honestly, the cam system explains more of the difference in how these bows feel than the price tag does.

Which one should you choose

One more thing before any of it matters. Cam systems are tuned around your draw length, and a half-inch error costs you more accuracy than picking the "wrong" system ever will. Measure properly — a draw length calculator takes two minutes — or run the Find My Bow quiz and let your specs narrow the field first.

The cam wars are mostly settled. Pick the maintenance schedule you'll actually keep.

• First compound, tight budget, or low-volume hunting: single cam. The Bear Redeem sits at the value end of our scored list for a reason — simple systems forgive neglect.
• Set-and-forget hunting accuracy: binary. No timing visits, level nock travel, done.
• Flagship feel with strong dealer support: hybrid. Hoyt's network is hard to beat when something does need attention.
• Competitive target work, and you own a press: twin cam still earns its keep — you'll re-time it on your schedule, not a shop's.