Spinlock's three core rope clutches step up by load, not by boat size alone: the XAS holds up to 575 kg, the XTS up to 1,000 kg, and the XCS up to 1,200 kg, so the right choice comes down to the diameter and working load of the line you're actually clutching. MAURIPRO stocks all three lines — single through quintuple, in the exact rope-range sizes below — so you can match the clutch to the line instead of guessing.
This is written for the cruiser or racer (~30-45 ft) replacing a worn clutch or adding a new control line at the mast or cockpit, staring at three similar-looking black Spinlock housings with no idea which one actually fits the job. All three share the same lever-and-cam mechanism — pull the handle up to release the line, push it down to clutch it — but the cam geometry, base material, and rated load change from model to model, and picking the wrong one either underrates your highest-load line or overpays for capacity a smaller control line will never use.
Spinlock rope clutches at a glance
| Model | Line range | Load rating (per Spinlock) | Best for | Example | Price |
|---|---|---|---|---|---|
| XAS | 4-12 mm | Up to 575 kg (1,268 lb) | Smaller control lines, racing yachts to 27 ft, cruisers to 35 ft | Single XAS, 6-12mm | $100.95 |
| XTS | 6-14 mm | Up to 1,000 kg (2,205 lb) | Mid-to-high-load halyards and sheets, lock-open cam available | Single XTS, 8-14mm | $164.95 |
| XCS | 6-14 mm | Up to 1,200 kg (2,646 lb) | The highest-load line on the boat, premium finish options | Single XCS Black, 8-14mm | $274.95 |
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What's the real difference between the XAS, XTS, and XCS?
It's load capacity and rope range, not brand tier. Per Spinlock's own published specifications, the XAS comes in two sizes — the XAS0408 for 4-8 mm lines rated to 400 kg (880 lb), and the XAS0612 for 6-12 mm lines rated to 575 kg (1,270 lb) — and Spinlock recommends it for racing yachts up to 27 ft and cruising yachts up to 35 ft. The XTS steps up in both rope range and load: the XTS0610 handles 6-10 mm lines to 700 kg, and the XTS0814 handles 8-14 mm lines to 1,000 kg, with an optional lock-open cam that lets a line run free in both directions until you re-engage the clutch. The XCS covers the same 6-14 mm rope range as the XTS but is rated to a higher 1,200 kg across the range, with a choice of anodized or ceramic-coated jaws and silver, black, or white finish options.
How do you match line diameter and load to the right clutch?
Start with the line, not the clutch. Check your halyard, sheet, or control line's actual diameter and compare it against each model's rated rope range — a 10 mm line sits at the top of the XAS0612's range but the bottom of the XTS0814's, so if that line also carries the highest load on the boat, the XTS gives you headroom the XAS doesn't. Then check working load: Dyneema and other low-stretch cores let sailors run smaller-diameter lines at higher loads than traditional double-braid, so a thin, high-load halyard can outrun an undersized clutch even though the rope physically fits the jaws. When a control line's working load is close to a model's rated maximum, size up rather than run at the limit.
Single, double, triple — how many lines does one clutch bank handle?
MAURIPRO stocks the XAS and XTS in single, double, triple, quadruple, and quintuple (up to 5-line) banks, and the XCS in single, double, and triple, all sharing the same base and cam per line so you can bank multiple control lines side by side at one mounting point. Each additional station adds its own base, cam, and handle — a double clutch is two complete clutch mechanisms sharing a common housing, not one mechanism split two ways — so there's no loss of individual holding power per line as you add stations. Size the bank to how many lines actually terminate at that spot (halyard, reef line, cunningham, outhaul), not to the space available on deck.
Which should you choose for your boat?
Choose the XAS for lighter-loaded lines on smaller boats — reefing lines, furling lines, cunninghams, or any control line under roughly 575 kg working load, especially on racing yachts to 27 ft or cruisers to 35 ft per Spinlock's own sizing guidance. Choose the XTS for the halyards and primary sheets on a mid-size cruiser or racer, where the 700-1,000 kg range covers most rigs without over-building the deck hardware, and where the lock-open cam is genuinely useful on a line you need to ease and re-trim often. Choose the XCS when one line on the boat — usually the main halyard or a heavily loaded primary — needs the highest rated capacity Spinlock builds into this clutch family, or when you want the premium anodized or ceramic-jaw finish options for a mast-mounted or highly visible location.
Expert notes
From our rigging bench: the single most common mis-order we see on Spinlock clutches isn't the wrong model, it's the wrong rope-range variant of the right model — an XTS0610 ordered for a line that actually measures 12 mm, which won't seat cleanly in a 6-10 mm cam. Measure the line with calipers, not by eye, before you order.
On boats upgrading to Dyneema control lines, we also recommend checking whether your existing clutch's cam is rated for low-stretch line — Spinlock's ceramic-coated cam option (available on XTS and XCS) holds modern low-stretch line better than the standard alloy cam, which can slip on very hard, slick line under high load.
Common mistakes
- Sizing the clutch to the line's diameter alone, ignoring load. A thin Dyneema halyard can carry more working load than a thicker double-braid line the same clutch was designed around — check load, not just diameter.
- Assuming XAS, XTS, and XCS share parts. They don't. Cams, bases, and handles are model-specific and don't cross-fit between the three families.
- Buying a triple or quad bank without confirming deck space. Multi-station clutches are wider than a single-line unit's footprint might suggest — check the base dimensions before drilling.
- Ignoring the lock-open cam option on a frequently-eased line. If a line gets eased and re-trimmed constantly (like a mainsheet traveler control or a spinnaker sheet), the XTS/L lock-open cam saves wear the standard cam doesn't.
Frequently asked questions
Which Spinlock rope clutch do I need?
Match your line's diameter to the clutch's rated rope range first, then check working load against the model's rating: XAS to 575 kg, XTS to 1,000 kg, XCS to 1,200 kg, per Spinlock's published specifications. MAURIPRO stocks all three in single through quintuple banks.
What's the difference between Spinlock XAS and XTS clutches?
The XAS is Spinlock's smaller-footprint clutch, covering 4-12 mm lines to 575 kg and recommended for racing yachts to 27 ft or cruisers to 35 ft. The XTS covers a similar 6-14 mm rope range but is rated to a higher 700-1,000 kg, making it the better fit for a mid-size boat's primary halyards and sheets.
Is the Spinlock XCS stronger than the XTS?
Yes. Both cover the same 6-14 mm rope range, but the XCS is rated to 1,200 kg versus the XTS's 1,000 kg, per Spinlock's specifications, and adds a choice of anodized or ceramic jaw finishes.
Can I mount a Spinlock clutch on the side of a cabin top or mast?
Yes — Spinlock sells side-mounting kits and fairings for the XAS, XTS, and XCS ranges specifically for cabin-top, coaming, or spar mounting, in addition to the standard flat-deck bases.
Does a Spinlock clutch work with Dyneema and other low-stretch line?
Yes, and for high-load Dyneema lines specifically, Spinlock's ceramic-coated cam option (available on the XTS and XCS) is worth the upgrade over the standard alloy cam for better grip on hard, slick low-stretch line.
Recommended gear
Spinlock Single XAS, 6-12mm — the entry point for lighter-loaded control lines on boats to 35 ft.
Spinlock Single XTS, 8-14mm — the balanced choice for a mid-size boat's primary halyards and sheets.
Spinlock Single XCS Black, 8-14mm — Spinlock's highest-rated clutch in this range, for the boat's most heavily loaded line.
Spinlock Double XCS Silver, 8-14mm — a two-line bank for boats running two high-load lines side by side.
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