{"product_id":"precor-rbk-835-recumbent-bike-w-p30-console-remanufactured","title":"Precor RBK 835 Recumbent Bike w\/P30 Console (Remanufactured)","description":"\u003cstyle\u003e\n  .bs-wrap *{box-sizing:border-box;margin:0;padding:0}\n  .bs-wrap{font-family:'Barlow',sans-serif;color:#1a1a1a;max-width:700px}\n  .bs-badge{display:inline-block;background:#1a1a1a;color:#f0ebe3;font-size:11px;font-weight:500;letter-spacing:.12em;text-transform:uppercase;padding:4px 10px;border-radius:3px;margin-bottom:16px}\n  .bs-desc{font-size:15px;line-height:1.8;color:#444;margin-bottom:24px}\n  .bs-desc strong{color:#1a1a1a;font-weight:500}\n  .bs-divider{border:none;border-top:1px solid #e5e5e5;margin:24px 0}\n  .bs-section-label{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:#999;font-weight:500;margin-bottom:12px}\n  .bs-muscles{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}\n  .bs-muscle-tag{font-size:12px;font-weight:500;padding:5px 13px;border-radius:20px;background:#fff7ed;color:#92400e;border:1px solid #fcd9a0}\n  .bs-muscle-tag.sec{background:#f5f5f5;color:#666;border-color:#e0e0e0}\n  .bs-exercises{display:flex;flex-wrap:wrap;gap:6px}\n  .bs-exercise-tag{font-size:11px;font-weight:500;padding:3px 10px;border-radius:20px;background:#f0f0f0;color:#555;border:1px solid #e0e0e0}\n  .bs-specs-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:24px}\n  .bs-spec-card{background:#f7f7f5;border-radius:8px;padding:14px 16px}\n  .bs-spec-label{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:#999;margin-bottom:4px}\n  .bs-spec-val{font-family:'Barlow Condensed',sans-serif;font-size:20px;font-weight:600;color:#1a1a1a}\n  .bs-spec-sub{font-size:12px;color:#888;margin-top:3px}\n  .bs-feat{display:flex;align-items:flex-start;gap:12px;padding:12px 0;border-top:1px solid #efefef}\n  .bs-feat:last-child{border-bottom:1px solid #efefef}\n  .bs-feat-icon{width:30px;height:30px;border-radius:50%;background:#fff0f0;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:1px}\n  .bs-feat-icon svg{width:14px;height:14px;stroke:#dc2626;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}\n  .bs-feat-name{font-size:14px;font-weight:500;color:#1a1a1a;margin-bottom:3px}\n  .bs-feat-desc{font-size:13px;color:#666;line-height:1.6}\n  .bs-span2{grid-column:span 2}\n\u003c\/style\u003e\n\u003cdiv class=\"bs-wrap\"\u003e\n\u003cp class=\"bs-desc\"\u003eThe Precor RBK 835 Recumbent Bike delivers \u003cstrong\u003e15° seat rail with crank offset for KOPS biomechanics, Air Flex floating seat back, one-handed seat adjustment on or off the bike, dual-sided pedals, deep-groove sealed precision bearings, 14\" step-through width with 4\" step-over height, touch HR handlebars, and P30 console — 210 lb commercial frame, 70\"×23\" footprint\u003c\/strong\u003e. The biomechanics specification on the RBK 835 is more precisely engineered than a standard recumbent bike: the seat rail is set at 15° with a specific offset from the crank axle that places the knee directly over the ball of the foot (or pedal spindle) when the pedals are at the 2 and 8 o'clock positions. This is the same KOPS principle applied on the UBK 865 and RBK 865, but defined here with the specific clock-position reference — the 2 and 8 o'clock positions are where the knee joint is at its most mechanically loaded moment through the pedaling arc, and having the knee directly over the pedal spindle at those positions minimizes anterior knee shear force at the highest-load instant of the stroke. The Air Flex seat back uses a floating suspension system that allows the seat back to move with the user's lumbar and sacral motion rather than being a fixed rigid surface — not just lumbar-shaped padding, but a backrest that tracks the user's movement. This is meaningfully different from a fixed lumbar support: a fixed pad supports one lumbar position; a floating suspension accommodates the small postural adjustments users make throughout a session without resistance from the seat back. The 4\" step-over height is among the lowest in commercial recumbent bikes, specifically benefiting users with balance limitations, joint stiffness, or post-surgical mobility restrictions.\u003c\/p\u003e\n\u003cp class=\"bs-desc\"\u003eDual-sided pedals with integrated straps accommodate feet of all sizes with or without the strap. Deep-groove sealed precision bearings for smooth operation and long service life. P30 console displays resistance, RPM, speed, watts, HR, calories, and time metrics. \u003cstrong\u003e210 lb Precor RBK 835 commercial frame\u003c\/strong\u003e, 70\"×23\" footprint. Remanufactured.\u003c\/p\u003e\n\u003chr class=\"bs-divider\"\u003e\n\u003cp class=\"bs-section-label\"\u003eSupported training\u003c\/p\u003e\n\u003cdiv class=\"bs-exercises\"\u003e\n\u003cspan class=\"bs-exercise-tag\"\u003eRecumbent Cycling\u003c\/span\u003e \u003cspan class=\"bs-exercise-tag\"\u003eLow-Impact Cardio\u003c\/span\u003e \u003cspan class=\"bs-exercise-tag\"\u003eEndurance Training\u003c\/span\u003e \u003cspan class=\"bs-exercise-tag\"\u003eInterval Training\u003c\/span\u003e \u003cspan class=\"bs-exercise-tag\"\u003eCardiac Rehabilitation\u003c\/span\u003e \u003cspan class=\"bs-exercise-tag\"\u003eHeart Rate Zone Training\u003c\/span\u003e \u003cspan class=\"bs-exercise-tag\"\u003eWatt-Based Training\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"bs-divider\"\u003e\n\u003cp class=\"bs-section-label\"\u003ePrimary muscles targeted\u003c\/p\u003e\n\u003cdiv class=\"bs-muscles\" style=\"margin-bottom: 10px;\"\u003e\n\u003cspan class=\"bs-muscle-tag\"\u003eQuadriceps\u003c\/span\u003e \u003cspan class=\"bs-muscle-tag\"\u003eHamstrings\u003c\/span\u003e \u003cspan class=\"bs-muscle-tag\"\u003eGluteus Maximus\u003c\/span\u003e \u003cspan class=\"bs-muscle-tag\"\u003eCalves\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"bs-section-label\"\u003eSecondary muscles\u003c\/p\u003e\n\u003cdiv class=\"bs-muscles\" style=\"margin-bottom: 0;\"\u003e\n\u003cspan class=\"bs-muscle-tag sec\"\u003eHip Flexors\u003c\/span\u003e \u003cspan class=\"bs-muscle-tag sec\"\u003eCore Stabilizers\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"bs-divider\"\u003e\n\u003cp class=\"bs-section-label\"\u003eKey features\u003c\/p\u003e\n\u003cdiv class=\"bs-feat\"\u003e\n\u003cdiv class=\"bs-feat-icon\"\u003e\u003csvg viewbox=\"0 0 24 24\"\u003e\u003ccircle cx=\"12\" cy=\"12\" r=\"10\"\u003e\u003c\/circle\u003e\u003ccircle cx=\"12\" cy=\"12\" r=\"3\"\u003e\u003c\/circle\u003e\u003cline x1=\"12\" y1=\"2\" x2=\"12\" y2=\"9\"\u003e\u003c\/line\u003e\u003cline x1=\"12\" y1=\"15\" x2=\"12\" y2=\"22\"\u003e\u003c\/line\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"bs-feat-name\"\u003e15° Seat Rail · Crank Offset · KOPS at 2 \u0026amp; 8 O'Clock\u003c\/div\u003e\n\u003cdiv class=\"bs-feat-desc\"\u003eSeat rail set at 15° with crank offset positions the knee directly over the pedal spindle at the 2 and 8 o'clock positions — the moments of highest mechanical load through the pedaling arc. KOPS alignment at peak-load positions minimizes anterior knee shear force where it matters most, rather than only at the bottom of the stroke where load is lower. Consistent with Precor's upright bike biomechanics applied to the recumbent position.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-feat\"\u003e\n\u003cdiv class=\"bs-feat-icon\"\u003e\u003csvg viewbox=\"0 0 24 24\"\u003e\u003cpath d=\"M12 2l8 4v6c0 5-4 9-8 10-4-1-8-5-8-10V6l8-4z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"bs-feat-name\"\u003eAir Flex Floating Seat Back · 4\" Step-Over · One-Handed Seat Adj.\u003c\/div\u003e\n\u003cdiv class=\"bs-feat-desc\"\u003eAir Flex floating suspension allows the seat back to move with the user's lumbar motion rather than holding one fixed position — accommodating the small postural adjustments that occur throughout a session without resistance from the seat back. 4\" step-over height among the lowest in commercial recumbent bikes, specifically for users with balance limitations or post-surgical mobility restrictions. One-handed seat adjustment from the saddle without dismounting.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-feat\"\u003e\n\u003cdiv class=\"bs-feat-icon\"\u003e\u003csvg viewbox=\"0 0 24 24\"\u003e\u003ccircle cx=\"12\" cy=\"12\" r=\"10\"\u003e\u003c\/circle\u003e\u003cpolyline points=\"12 6 12 12 16 14\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"bs-feat-name\"\u003eDual-Sided Pedals · Sealed Precision Bearings · P30 Console\u003c\/div\u003e\n\u003cdiv class=\"bs-feat-desc\"\u003eDual-sided pedals with integrated straps usable on either side — entry without orientation requirement, strap or no-strap flexibility. Deep-groove sealed precision ball bearings on the bottom bracket for smooth operation and long service life without maintenance access. P30 console displays resistance, RPM, speed, watts, HR, calories, time elapsed, time remaining, and segment metrics.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"bs-divider\"\u003e\n\u003cp class=\"bs-section-label\"\u003eSpecifications\u003c\/p\u003e\n\u003cdiv class=\"bs-specs-grid\"\u003e\n\u003cdiv class=\"bs-spec-card\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eDimensions (L × W × H)\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003e70\" × 23\" × 50\"\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-sub\"\u003eStep-through: 14\" wide · Step-over: 4\"\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-card\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eMachine Weight\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003e210 lb\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-card\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eBiomechanics \u0026amp; Seat\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003eKOPS · Air Flex · 15°\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-sub\"\u003e15° seat rail · Crank offset · Floating suspension · One-handed adj.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-card\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eCondition\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003eRemanufactured\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-sub\"\u003ePrecor RBK 835 · \u003ca href=\"https:\/\/ctxhomegyms.com\/pages\/what-is-refurbished\" style=\"color: #888; text-decoration: underline;\"\u003eView condition details\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-card bs-span2\"\u003e\n\u003cdiv class=\"bs-spec-label\"\u003eTechnology \u0026amp; Design\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-val\"\u003eKOPS 15° · Air Flex · Dual Pedals · P30 · 210 lb\u003c\/div\u003e\n\u003cdiv class=\"bs-spec-sub\"\u003e15° seat rail · Crank KOPS offset · Air Flex floating seat back · One-handed seat adj. · Dual-sided pedals · Sealed precision bearings · 4\" step-over · 14\" step-through · Touch HR · P30 console · 210 lb frame · 70\"×23\" footprint\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ============================================================\nSEO FIELDS — paste into Shopify's Search Engine Listing section\n============================================================\n\nPage title (max 60 chars):\nPrecor RBK 835 Recumbent Bike P30 | Remanufactured\n\nMeta description (max 160 chars):\nRemanufactured Precor RBK 835 Recumbent Bike with P30. KOPS biomechanics, Air Flex seat, 4\" step-over, 210 lb commercial recumbent bike, 70×23\" footprint.\n\nTags (comma separated):\nPrecor RBK 835 recumbent bike, RBK 835 remanufactured, P30 recumbent bike, KOPS recumbent bike, Air Flex seat recumbent, 4 inch step over recumbent, one handed seat adjustment recumbent, commercial recumbent bike, Precor recumbent remanufactured, dual sided pedal recumbent\n\n============================================================ --\u003e","brand":"Precor","offers":[{"title":"Default Title","offer_id":47635698188528,"sku":"PRE-RBK-835","price":1995.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0510\/0981\/4682\/files\/5_7d1dad9d-04a7-41c8-bf8e-831f392d1ec9.png?v=1758308356","url":"https:\/\/www.buildagym.com\/es\/products\/precor-rbk-835-recumbent-bike-w-p30-console-remanufactured","provider":"Build A Gym","version":"1.0","type":"link"}