{"product_id":"zipp-303-xplr-s-carbon-tubeless-disc-gravel-wheelset","title":"Zipp 303 XPLR S Carbon Tubeless Disc Gravel Wheelset","description":"\u003cstyle\u003e\n  .zx-pdp { font-family: inherit; font-size: inherit; line-height: inherit; color: inherit; }\n  .zx-pdp h4 { font-size: 16px; font-weight: 700; margin: 30px 0 8px; border-bottom: 1px solid #e0e0e0; padding-bottom: 4px; }\n  .zx-pdp p { margin: 0 0 12px; }\n  .zx-pdp ul { margin: 0 0 12px; padding-left: 22px; }\n  .zx-pdp li { margin-bottom: 5px; }\n  .zx-pdp a { color: #0055cc; }\n  .zx-pdp .note { font-style: italic; font-size: 13px; color: #555; }\n  .zx-divider { border: none; border-top: 1px solid #e5e5e5; margin: 32px 0; }\n  .zx-press { border-left: 3px solid #111; padding: 14px 20px; margin: 16px 0 20px; background: #fafafa; }\n  .zx-press .pc-quote { font-size: 14px; font-style: italic; color: #222; line-height: 1.7; margin-bottom: 6px; }\n  .zx-press .pc-source { font-size: 12px; color: #777; font-weight: 700; }\n  .zx-warn { border-left: 3px solid #b23b2e; padding: 14px 20px; margin: 20px 0 16px; background: #fdf6f5; }\n  .zx-warn .ec-headline { font-size: 15px; font-weight: 700; color: #b23b2e; margin-bottom: 6px; }\n  .zx-warn .ec-body { font-size: 13px; color: #444; line-height: 1.6; }\n\u003c\/style\u003e\n\n\u003cdiv class=\"zx-pdp\"\u003e\n\n\u003cp\u003e\u003cstrong\u003e32mm internal. 54mm deep. Built around the tire instead of the other way around.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eMost gravel wheels are road rims that got a little wider. The 303 XPLR S isn't. Zipp started with the gravel tire — how it actually deforms, how it corners, what it does to the air — and built a rim to match it.\u003c\/p\u003e\n\n\u003cp\u003eThe result looks more like an aero road wheel than anything gravel has seen, and it's the reason this thing is fast in a way rim depth alone doesn't explain.\u003c\/p\u003e\n\n\u003cdiv class=\"zx-press\"\u003e\n\u003cdiv class=\"pc-quote\"\u003eEscape Collective, testing the 303 XPLR platform, described the rims as \u003cem\u003e\"mind-bogglingly wide\"\u003c\/em\u003e — noting that at 32mm internal, Zipp had moved gravel rim dimensions somewhere the category hadn't been.\u003c\/div\u003e\n\u003cdiv class=\"pc-source\"\u003e— Escape Collective\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003chr class=\"zx-divider\"\u003e\n\n\u003ch4\u003eWhy 32mm internal changes the tire\u003c\/h4\u003e\n\n\u003cp\u003eMount a 45mm gravel tire on a typical 25mm internal rim and the casing bulges outward above the rim like a lightbulb. That shape is why wide tires can feel vague at low pressure — the sidewall has to do too much work, so it folds under cornering load and the contact patch moves around under you.\u003c\/p\u003e\n\n\u003cp\u003eAt 32mm internal, that same tire seats in a profile much closer to what the tire engineer actually designed: rounder, better supported at the sidewall, with a contact patch that stays where you put it.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe practical outcome is pressure.\u003c\/strong\u003e You can run under 30 psi without the tire squirming, which means the casing absorbs the surface instead of transmitting it. Lower rolling resistance on rough ground, more grip in loose corners, and considerably less vibration reaching you over four hours.\u003c\/p\u003e\n\n\u003chr class=\"zx-divider\"\u003e\n\n\u003ch4\u003eAnd the aerodynamics\u003c\/h4\u003e\n\n\u003cp\u003eThe rim is 40mm at its widest external point and 54mm deep. That matters because on a conventional gravel wheel, a 40mm+ tire is significantly wider than the rim beneath it — air hits the tire, separates, and never reattaches cleanly to the rim.\u003c\/p\u003e\n\n\u003cp\u003eHere the rim and tire form a continuous profile, so the airflow stays attached across the transition. That's real drag reduction at gravel race speeds, not a claim that evaporates below 25 mph.\u003c\/p\u003e\n\n\u003cp\u003eThis is what Zipp means by Total System Efficiency: the wheel isn't optimized on its own, it's optimized as a wheel-and-tire system.\u003c\/p\u003e\n\n\u003chr class=\"zx-divider\"\u003e\n\n\u003cdiv class=\"zx-warn\"\u003e\n\u003cdiv class=\"ec-headline\"\u003eRead this before you order: hookless, tubeless-only, 50 psi max\u003c\/div\u003e\n\u003cdiv class=\"ec-body\"\u003eThese rims have no bead hook. That's what allows the profile to be shaped for aerodynamics rather than around a clincher hook, but it comes with hard rules you can't work around:\u003cbr\u003e\u003cbr\u003e\n\u003cstrong\u003eTubeless tires only.\u003c\/strong\u003e No tubed clinchers, ever.\u003cbr\u003e\n\u003cstrong\u003e50 psi maximum.\u003c\/strong\u003e Not a recommendation — a limit.\u003cbr\u003e\n\u003cstrong\u003eApproved tires only.\u003c\/strong\u003e The tire must be on Zipp's approved hookless list for this rim. Not every tubeless gravel tire qualifies.\u003cbr\u003e\n\u003cstrong\u003e40c–61c only.\u003c\/strong\u003e Narrower tires are not approved on a 32mm internal rim, so this is not a wheelset you can put road rubber on.\u003cbr\u003e\u003cbr\u003e\nCheck Zipp's current approved tire list before buying tires. Running a non-approved tire or over-inflating a hookless rim can blow the tire off the rim.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003chr class=\"zx-divider\"\u003e\n\n\u003ch4\u003eThe build\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eHubs:\u003c\/strong\u003e Zipp 76 front and 176 DB rear, with Center Lock rotor interface and stainless steel cartridge bearings. Straightforward, serviceable, and durable rather than exotic.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpokes:\u003c\/strong\u003e 24 CX-Sprint front and rear, laced 2-cross with brass nipples. Brass rather than aluminum is a deliberate durability choice — they don't corrode into the rim and they survive being re-tensioned years from now.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRim finish:\u003c\/strong\u003e UD carbon with adhesive decals. If you don't like the graphics, they come off with a heat gun and patience.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e1,610g\u003c\/strong\u003e for the pair, tape and valves included in that figure.\u003c\/p\u003e\n\n\u003chr class=\"zx-divider\"\u003e\n\n\u003ch4\u003eDriver body — choose carefully\u003c\/h4\u003e\n\n\u003cp\u003eAvailable with either an \u003cstrong\u003eXDR\u003c\/strong\u003e or \u003cstrong\u003eShimano HG\u003c\/strong\u003e driver.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eXDR\u003c\/strong\u003e — for SRAM 12-speed road and gravel cassettes with a 10-tooth small cog, including XPLR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHG\u003c\/strong\u003e — for Shimano and SRAM 11-speed cassettes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eOne important limitation:\u003c\/strong\u003e the 303 XPLR S cannot be converted to Shimano MicroSpline. Only the higher-tier 303 XPLR SW offers that. If you're running or planning a Shimano 12-speed drivetrain that requires MicroSpline, this is not the wheelset for you.\u003c\/p\u003e\n\n\u003cp\u003eDriver bodies are otherwise swappable, so moving between XDR and HG later is possible.\u003c\/p\u003e\n\n\u003chr class=\"zx-divider\"\u003e\n\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel size:\u003c\/strong\u003e 700c\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAxles:\u003c\/strong\u003e 12x100mm front, 12x142mm rear thru-axle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrakes:\u003c\/strong\u003e Disc, Center Lock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTires:\u003c\/strong\u003e Tubeless only, approved hookless tires 40c–61c\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax tire pressure:\u003c\/strong\u003e 50 psi \/ 3.45 bar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax system weight:\u003c\/strong\u003e 298 lb \/ 135 kg, rider plus bike plus gear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eConfirm your frame clears a 40mm+ tire on a 40mm-wide rim before ordering. Because the rim is wider than most, a tire measures wider on it than it would on a narrower rim — a nominal 45c can come out closer to 47–48mm.\u003c\/p\u003e\n\n\u003chr class=\"zx-divider\"\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e WH-303-XPS-A1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim construction:\u003c\/strong\u003e Carbon, hookless\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim depth:\u003c\/strong\u003e 54mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal width:\u003c\/strong\u003e 32mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal width:\u003c\/strong\u003e 40mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim profile:\u003c\/strong\u003e Symmetrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRim finish:\u003c\/strong\u003e UD fiber, adhesive decals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHubs:\u003c\/strong\u003e Zipp 76 front \/ 176 DB rear, Center Lock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearings:\u003c\/strong\u003e Stainless steel cartridge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpokes:\u003c\/strong\u003e CX-Sprint, 24 front \/ 24 rear, 2-cross\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNipples:\u003c\/strong\u003e Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDriver body:\u003c\/strong\u003e XDR or Shimano HG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAxles:\u003c\/strong\u003e 12x100mm \/ 12x142mm thru-axle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1,610g per pair, including tape and valves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded:\u003c\/strong\u003e Tubeless tape, valves, 12mm front and rear end caps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Zipp lifetime warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr class=\"zx-divider\"\u003e\n\n\u003ch4\u003eSetup\u003c\/h4\u003e\n\n\u003cp\u003eThese arrive taped with valves included, so setup is sealant and an approved tire. A compressor or high-volume floor pump makes seating a hookless bead considerably easier than a standard pump will.\u003c\/p\u003e\n\n\u003cp\u003eSeat the tire dry first and confirm the bead is fully and evenly seated all the way around \u003cem\u003ebefore\u003c\/em\u003e adding sealant. On a hookless rim this check matters more than it does on a hooked one.\u003c\/p\u003e\n\n\u003cp\u003eStart around 28–30 psi for a 45mm tire and work down from there. Most riders coming from narrower rims run these too hard for the first few rides and wonder what the fuss is about — the whole point of the platform is the pressure you can get away with.\u003c\/p\u003e\n\n\u003chr class=\"zx-divider\"\u003e\n\n\u003cp class=\"note\"\u003eAlways check Zipp's current approved hookless tire list before fitting tires. Zipp, XPLR, ABLC, and Total System Efficiency are trademarks of SRAM LLC. Quotation from Escape Collective's review of the Zipp 303 XPLR platform, referenced for context and not an endorsement of State Bicycle Co.\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"ZIPP","offers":[{"title":"Default Title","offer_id":44099891363927,"sku":"751503807046","price":1152.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0232\/3305\/files\/ZPTOB1-3_a8dacf1f-5cc3-4030-a8c8-06621f75af68.jpg?v=1785867518","url":"https:\/\/www.statebicycle.com\/en-gb\/products\/zipp-303-xplr-s-carbon-tubeless-disc-gravel-wheelset","provider":"State Bicycle Co.","version":"1.0","type":"link"}