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Racework
Eligible return or exchange requests must be submitted within 45 days of the order date. Items must be new and unused with original packaging, tags, and accessories. General change-of-mind returns are not accepted. Customers cover return shipping for size exchanges; Alpine Extreme covers approved returns caused by an incorrect, damaged, or defective item. See the full Return & Refund Policy for exclusions and refund timing.
Free standard shipping is available to most addresses worldwide. Availability, delivery estimates, and any expedited charges depend on the destination and order. International customers are responsible for applicable duties, tariffs, or customs fees.
Fast bike. Sharp fit. Zero fluff.
The RK90 is a 273 gram saddle, plus or minus 10 grams, built for high cadence road days, MTB laps, and long, low TT positions without the dead weight feel. Big center cutout. Slim nose. Race ready shape.
Ultralight build: 273 grams, plus or minus 10 grams
Size: 270 x 140 mm platform for a locked-in, efficient stance
Full-length center cutout for pressure relief in drops and aero positions
Chrome-moly steel rails for durable clamping and hard use
High-grade EVA padding that supports without turning mushy
Nylon cover for grip and wear resistance
Engineered plastic base for stiffness where it counts
Four colorways: Black, Black with Red speckle, Black with Blue speckle, Black with Green speckle
Run it on MTB, road, TT, tri, and trainer builds where grams matter and the position stays forward.
Best for riders chasing a clean pedal stroke, stable sit bone support, and cutout driven relief during long efforts.
Cut weight. Keep pressure off. Hold speed.
Email gearup@alpineextreme.co or use our contact form.
Free standard shipping is available to most addresses worldwide. Availability, delivery estimates, and any expedited charges depend on the destination and order. International duties, tariffs, and customs fees remain the customer’s responsibility. See our Shipping Policy for details.
Eligible return or exchange requests must be submitted within 45 days of the order date. Items must be new and unused with original packaging, tags, and accessories. General change-of-mind returns are not accepted. Return-shipping responsibility depends on the reason for the return. See the full Return & Refund Policy for exclusions and refund timing.
Orders are typically processed within 2–5 business days. Most standard shipments arrive within 7–14 business days after shipping, depending on destination and carrier conditions. Delivery estimates are not guaranteed.
Yes. Tracking details are emailed after shipment. You can also check order status with your order information through our order-tracking page.
Email gearup@alpineextreme.co or submit the form on our support page. Report delivery issues within 60 days of the order date so carrier information is still available.
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