{"title":"Fiberglass Sprint Seats","description":"\u003cp\u003eFiberglass sprint seats are rigid glass-fiber composite shells used in sit-up sprint karts. They come in sized shells such as small through extra-large so the driver can sit in a fixed, repeatable position.\u003c\/p\u003e","products":[{"product_id":"kmsl-large-fiberglass-seat","title":"KMSL Large Fiberglass Kart Seat - 18\" Thighs, 14.25\" Arms","description":"","brand":"Swift Karting","offers":[{"title":"Default Title","offer_id":53244436775230,"sku":"KMSL","price":98.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/KMSL_Large_Fiberglass_Seat.jpg?v=1774900532"},{"product_id":"kmsm-medium-fiberglass-kart-seat","title":"Medium Fiberglass Kart Seat - 12.25\" Ribs, 13.5\" Arm Pits, 17.25\" Thighs","description":"\u003ch2\u003eDiscover the KMSM Medium Fiberglass Kart Seat\u003c\/h2\u003e\u003cp\u003eEngineered for kart enthusiasts seeking a reliable, form-fitting seat, the KMSM Medium Fiberglass Seat delivers the support needed during intense track sessions. Crafted from durable fiberglass, this seat offers a balance of lightness and strength, helping maintain your position through corners and straights.\u003c\/p\u003e\u003cp\u003eKey measurements ensure a tailored fit: \u003cstrong\u003e12.25 inches at the ribs\u003c\/strong\u003e for snug upper body hold, \u003cstrong\u003e13.5 inches at the arm pits\u003c\/strong\u003e to accommodate natural arm placement, and \u003cstrong\u003e17.25 inches at the thighs\u003c\/strong\u003e for stable leg positioning. These dimensions make it ideal for drivers wanting confidence-inspiring seating without excess bulk.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e12.25\" width at ribs – secures torso effectively\u003c\/li\u003e\n\u003cli\u003e13.5\" width at arm pits – allows free shoulder movement\u003c\/li\u003e\n\u003cli\u003e17.25\" width at thighs – anchors legs for precise throttle and brake input\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFiberglass construction resists wear from track vibrations and impacts, while the contoured shape promotes better weight distribution. Easy to mount in most kart chassis, it enhances overall handling by keeping you planted. Whether you're a club racer or building for competition, this medium seat strikes the perfect size for versatile performance.\u003c\/p\u003e\u003cp\u003eUpgrade your kart's cockpit with this essential component that prioritizes driver comfort and control. Pair it with standard seat hardware for quick installation and reliable longevity on the circuit.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003ch4\u003eWhat are the exact dimensions of the KMSM Medium Fiberglass Seat?\u003c\/h4\u003e\u003cp\u003e12.25\" at ribs, 13.5\" at arm pits, and 17.25\" at thighs for a precise, medium-sized fit.\u003c\/p\u003e\u003ch4\u003eIs this seat made from fiberglass?\u003c\/h4\u003e\u003cp\u003eYes, it's constructed from medium fiberglass for durability and lightweight performance.\u003c\/p\u003e\u003ch4\u003eWhat karts does this seat fit?\u003c\/h4\u003e\u003cp\u003eDesigned as a standard medium kart seat; check your chassis specs for compatibility.\u003c\/p\u003e\u003ch4\u003eHow do I mount this seat?\u003c\/h4\u003e\u003cp\u003eUse common seat struts and hardware (sold separately) for secure installation.\u003c\/p\u003e","brand":"Swift Karting","offers":[{"title":"Default Title","offer_id":53244437037374,"sku":"KMSM","price":93.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/KMSM_Medium_Fiberglass_Seat.jpg?v=1774900566"},{"product_id":"kmss-small-fiberglass-kart-seat","title":"Small Fiberglass Kart Seat KMSS - 11.5\" Ribs 16.75\" Thighs","description":"\u003ch2\u003eKMSS Small Fiberglass Kart Seat\u003c\/h2\u003e\n\u003cp\u003eEngineered for precision in go-kart racing, the KMSS Small Fiberglass Seat delivers a tailored fit with exact measurements: 11.5 inches wide at the ribs, 12.75 inches at the armpits, and 16.75 inches at the thighs. This compact design ensures drivers stay securely positioned during high-speed turns and straightaways, enhancing control and confidence on the track.\u003c\/p\u003e\n\u003cp\u003eCrafted from durable fiberglass, it provides the strength needed for intense racing conditions while maintaining a lightweight profile suited for smaller frames. Whether you're outfitting a junior kart or a custom build, these dimensions support optimal body alignment, reducing fatigue over long sessions.\u003c\/p\u003e\n\u003cp\u003eKey dimensions at a glance:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRibs: 11.5\" wide\u003c\/li\u003e\n\u003cli\u003eArmpits: 12.75\" wide\u003c\/li\u003e\n\u003cli\u003eThighs: 16.75\" wide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePerfect for racers prioritizing a glove-like fit without excess bulk. Installs easily into most kart chassis, making it a go-to choice for teams and enthusiasts.\u003c\/p\u003e\n\u003ch3\u003eWhy Choose This Seat?\u003c\/h3\u003e\n\u003cp\u003eThe graduated widths accommodate natural body contours, promoting better weight distribution and stability. It's built to withstand the rigors of track use, offering reliability lap after lap.\u003c\/p\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003ch4\u003eWhat are the exact width measurements of the KMSS Small Fiberglass Seat?\u003c\/h4\u003e\n\u003cp\u003e11.5 inches at the ribs, 12.75 inches at the armpits, and 16.75 inches at the thighs.\u003c\/p\u003e\n\u003ch4\u003eIs this seat suitable for junior kart drivers?\u003c\/h4\u003e\n\u003cp\u003eYes, its small sizing makes it ideal for younger or smaller drivers needing a secure fit.\u003c\/p\u003e\n\u003ch4\u003eWhat material is the seat made from?\u003c\/h4\u003e\n\u003cp\u003eFiberglass for durability and lightweight performance.\u003c\/p\u003e\n\u003ch4\u003eDoes it fit standard kart chassis?\u003c\/h4\u003e\n\u003cp\u003eIt mounts to most standard kart setups; verify compatibility with your chassis.\u003c\/p\u003e","brand":"Swift Karting","offers":[{"title":"Default Title","offer_id":53244437168446,"sku":"KMSS","price":86.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/KMSS_Small_Fiberglass_Seat.jpg?v=1774900593"},{"product_id":"kmsxl-extra-large-fiberglass-kart-seat","title":"Extra Large Fiberglass Kart Seat KMSXL - 18.75\" Thigh Width","description":"\u003ch2\u003eUpgrade Your Kart with the KMSXL Extra Large Fiberglass Seat\u003c\/h2\u003e\u003cp\u003eEngineered for larger racers, this KMSXL extra large fiberglass seat delivers the space and support needed for intense karting sessions. Crafted from high-strength fiberglass, it withstands track abuse while providing a custom-like fit. Ideal for drivers requiring more room without sacrificing performance or safety.\u003c\/p\u003e\u003ch3\u003eKey Measurements for Perfect Fit\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e13.75\" width at ribs\u003c\/li\u003e\n\u003cli\u003e15\" width at arm pits\u003c\/li\u003e\n\u003cli\u003e18.75\" width at thighs\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThese precise dimensions ensure ample thigh support and upper body stability, reducing fatigue during long races. The contoured shape promotes better weight distribution, enhancing handling and driver confidence on the circuit.\u003c\/p\u003e\u003cp\u003eFiberglass construction means lightweight durability—resistant to cracks and flex under pressure. Easy to mount on most kart chassis with a \u003ca href=\"\/products\/seat-mounting-kit-msmk\"\u003ecomplete seat mounting kit\u003c\/a\u003e (sold separately). Black finish resists fading from sun and track chemicals, maintaining a pro look race after race.\u003c\/p\u003e\u003ch3\u003eWhy Choose This Seat?\u003c\/h3\u003e\u003cp\u003eBuilt for serious kart enthusiasts, it accommodates bigger builds comfortably. Pair it with your existing setup for immediate improvements in posture and control. Whether club racing or practice, this seat keeps you planted through corners.\u003c\/p\u003e\u003ch3\u003eFinish Your Seat Setup\u003c\/h3\u003e\u003cp\u003eA bare fiberglass shell needs a little more to be race-ready. Add a \u003ca href=\"\/products\/three-piece-adhesive-seat-pad-set-rwsp603\"\u003eThree-Piece Adhesive Seat Pad Set\u003c\/a\u003e for cushioning and a snugger fit, and brace it to your chassis rails with a \u003ca href=\"\/products\/universal-adjustable-seat-strut-km200-km200\"\u003eLeatherneck KM200 Adjustable Seat Strut\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch4\u003e1. What are the exact width measurements of the KMSXL seat?\u003c\/h4\u003e\u003cp\u003e13.75\" at the ribs, 15\" at the arm pits, and 18.75\" at the thighs.\u003c\/p\u003e\u003ch4\u003e2. Is this seat made from fiberglass?\u003c\/h4\u003e\u003cp\u003eYes, it's constructed from durable fiberglass for strength and lightness.\u003c\/p\u003e\u003ch4\u003e3. Does it fit standard kart chassis?\u003c\/h4\u003e\u003cp\u003eIt mounts easily with common seat hardware on most chassis; verify your setup.\u003c\/p\u003e\u003ch4\u003e4. What sizes is this seat designed for?\u003c\/h4\u003e\u003cp\u003eExtra large sizing suits bigger drivers based on the provided body width specs.\u003c\/p\u003e\u003ch4\u003e5. Is the seat color black?\u003c\/h4\u003e\u003cp\u003eYes, it features a sleek black fiberglass finish.\u003c\/p\u003e","brand":"Swift Karting","offers":[{"title":"Default Title","offer_id":53244437528894,"sku":"KMSXL","price":107.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/KMSXL_Extra_Large_Fiberglass_Seat.jpg?v=1774900648"},{"product_id":"kmsxxl-fiberglass-double-extra-large-kart-seat","title":"XXL Fiberglass Kart Seat - Double Extra Large (2X) with 20.75\" Thigh Width","description":"\u003ch2\u003ePremium XXL Fiberglass Kart Seat for Larger Drivers\u003c\/h2\u003e\n\u003cp\u003eEngineered for comfort and performance, the KMSXXL Fiberglass Double Extra Large Seat (2X) offers ample room for bigger racers. Crafted from high-strength fiberglass, this seat delivers lightweight durability without sacrificing support during intense karting sessions. Its generous dimensions ensure a secure, customized fit that keeps you planted through corners and straights.\u003c\/p\u003e\n\u003ch3\u003eKey Dimensions for Optimal Fit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e15.75\" width at ribs for torso stability\u003c\/li\u003e\n\u003cli\u003e17\" width at arm pits for shoulder freedom\u003c\/li\u003e\n\u003cli\u003e20.75\" width at thighs for powerful leg positioning\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese measurements make it ideal for drivers needing extra space, enhancing control and reducing fatigue over long races. The contoured design promotes proper posture, helping you maintain peak performance lap after lap. Easy to mount in most kart chassis, it's a go-to choice for club and competitive karting.\u003c\/p\u003e\n\u003cp\u003eFiberglass construction resists cracking and flexing under load, providing longevity race after race. Pair it with standard seat hardware for quick installation and adjustments to match your driving style.\u003c\/p\u003e\n\u003ch3\u003eWhy Choose This XXL Seat?\u003c\/h3\u003e\n\u003cp\u003eLarger drivers often struggle with standard seats that pinch or shift. The KMSXXL eliminates that issue with its expanded sizing, offering confidence-inspiring support. Whether you're pushing limits on the track or practicing for nationals, this seat adapts to your build for maximum feedback from the kart.\u003c\/p\u003e\n\u003cdiv class=\"faq-section\"\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eWhat are the exact width measurements of the KMSXXL seat?\u003c\/h4\u003e\n\u003cp\u003e15.75\" at the ribs, 17\" at the arm pits, and 20.75\" at the thighs.\u003c\/p\u003e\n\u003ch4\u003eIs this seat made from fiberglass?\u003c\/h4\u003e\n\u003cp\u003eYes, it's constructed from durable fiberglass for lightweight strength.\u003c\/p\u003e\n\u003ch4\u003eWhat sizes does 'Double Extra Large (2X)' refer to?\u003c\/h4\u003e\n\u003cp\u003eIt indicates an oversized design for larger drivers, based on the provided body width specs.\u003c\/p\u003e\n\u003ch4\u003eDoes it fit standard kart chassis?\u003c\/h4\u003e\n\u003cp\u003eYes, compatible with common mounting points; uses standard seat hardware.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Swift Karting","offers":[{"title":"Default Title","offer_id":53244437725502,"sku":"KMSXXL","price":116.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/KMSXXL_Fiberglass_Double_Extra_Large_Seat_2X_55c5c1c5-6634-4162-bc64-18a5b6cba026.jpg?v=1774900680"},{"product_id":"rlv-extreme-seat-xscd-extra-small","title":"RLV Extreme XS Kart Seat XSCD - Extra Small Medium Flex","description":"\u003cp\u003eThe RLV Extreme XSCD extra small seat is built for smaller drivers who need a precise, snug fit to maintain control during races.\u003c\/p\u003e\u003cp\u003eKey measurements include 10.75 inches at the ribs, 12.5 inches at the hips, and 11.0 to 11.5 inches at the arm pits, creating a compact driving position.\u003c\/p\u003e\u003cp\u003eIts medium standard flex strikes a balance between rigidity and comfort, helping drivers stay planted through corners.\u003c\/p\u003e\u003cp\u003eIdeal for junior classes, this seat integrates cleanly into most kart chassis for reliable performance.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhat are the dimensions of this RLV Extreme seat?\u003c\/h3\u003e\u003cp\u003e10.75\" at ribs, 12.5\" at hips, and 11.0-11.5\" at arm pits.\u003c\/p\u003e\u003ch3\u003eWhat flex rating does the XSCD extra small seat have?\u003c\/h3\u003e\u003cp\u003eIt features medium (standard) flex.\u003c\/p\u003e\u003ch3\u003eIs this seat suitable for junior karters?\u003c\/h3\u003e\u003cp\u003eYes, the extra small sizing is specifically designed for smaller drivers in junior and cadet classes.\u003c\/p\u003e","brand":"RLV","offers":[{"title":"Default Title","offer_id":54336016744766,"sku":"SXK0122","price":128.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/files\/RLV_Extreme_Seat_XSCD_Extra_Small_CLOSEOUT.png?v=1787800281"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/4721\/8494\/collections\/KMSS_Small_Fiberglass_Seat_7c6aa143-a673-4db4-8acd-e5cbbc41c6b7.jpg?v=1788968723","url":"https:\/\/swiftkarting.com\/collections\/fiberglass-sprint-kart-seats-gman-renegade.oembed","provider":"Swift Karting","version":"1.0","type":"link"}