Tern - Sidekick Doublewide Decks

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Tern Sidekick Doublewide Decks *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; } :root { --black: #111110; --white: #fafaf8; --gray-100: #f5f5f3; --gray-200 : #e8e8e5; --gray-400: #a8a8a4; --gray-600: #6b6b67; --accent: #d95f2b; --accent-light: #f5e8e0; --font-sans: 'DM Sans', sans-serif; --font-mono: 'DM Mono', monospace; } body { font-family: var(--font-sans); background: var(--white); color: var(--black); min-height: 100vh; padding: 0; } .page { max-width: 760px; margin: 0 auto; padding: 3rem 2rem 5rem; } .breadcrumb { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--gray-400); font-family: var(--font-mono); margin-bottom: 2.5rem; letter-spacing: 0.02em; flex-wrap: wrap; } .breadcrumb span { color: var(--gray-200); } .product-header { margin-bottom: 2rem; } .badge-row { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 0.75rem; } .badge { display: inline-block; font-size: 10px; font-family: var(--font-mono); letter-spacing: 0.1em; 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Requires Lockstand Extensions. $60 CAD GSD only — Lockstand Extensions required. The Sidekick Doublewide Decks are designed exclusively for the Tern GSD and require Lockstand Extensions to mount — they are not optional. Combined capacity is 100 kg with Lockstand QuadStruts or 80 kg with the stock GSD kickstand. If carrying passengers on the decks, consult Tern's Passenger Guide for required safety accessories before use. 100 kg combined (with QuadStruts) 80 kg with stock kickstand 50 kg per side (110 lb) 25 cm deck width (10 in) The Tern Sidekick Doublewide Decks are fold-out side platforms that mount on either side of the GSD's rear axle, extending the cargo and passenger capacity of the bike laterally. Each deck is 25 cm wide — the "Doublewide" designation — providing a substantially larger platform than standard Sidekick decks for bulky items, groceries in bags, or a passenger's feet. At 50 kg per side (100 kg combined when paired with Lockstand QuadStruts), they are rated for serious loads. The low mounting position keeps cargo close to the ground, reducing the high centre of gravity that a loaded rear rack introduces. The decks fold flat when not in use and can stow in front of or behind Cargo Hold 52 Panniers when both are on the bike. Highlights 25 cm wide — the "Doublewide" advantage At 25 cm (10 in) per deck, the Doublewide provides a substantially wider platform than standard Sidekick decks. That extra width makes the difference for awkward cargo — shopping bags that want to tip, boxes that are too wide for a narrow rail, or a child's feet that need proper support. The full deck width is available as a flat surface, not just a rail edge. 100 kg combined with QuadStruts — 80 kg stock Combined capacity depends on the kickstand: 80 kg with the GSD's stock kickstand, 100 kg when Lockstand QuadStruts are installed. The QuadStruts upgrade the kickstand to a four-point stance that distributes the additional load without tipping. If you're regularly loading near the 80 kg mark, QuadStruts are the safer pairing. Per-side rating is 50 kg in both configurations. Low mounting — cargo stays close to the ground The side deck position puts load at axle height — significantly lower than a rear rack platform. Lower cargo placement reduces the pendulum effect on a heavily loaded bike, keeping handling more predictable through corners and at low speeds. The GSD's frame is specifically engineered for this low-and-wide cargo loading position. Foldable — stows flat when not in use The decks fold up against the bike when not carrying cargo or passengers. Stows in front of or behind Cargo Hold 52 Panniers so pannier and deck use aren't mutually exclusive. Folded, they don't add significant width to the bike footprint for storage or filtering through traffic. Passenger footrests — cargo and people The decks serve as footrests when carrying a passenger on the GSD's rear cargo area. A child or small adult can stand or sit with feet on the Sidekick decks rather than dangling. Passenger use has additional safety requirements — Tern's Passenger Guide specifies which other accessories are required and should be read before carrying any passenger. Lockstand Extensions — required, not optional Lockstand Extensions must be installed before the Sidekick Doublewide Decks can be fitted. The extensions modify the GSD's kickstand geometry to accommodate the wider deck footprint. Without them, the decks cannot be properly mounted. If ordering the decks without already having Lockstand Extensions, both must be purchased together. Specifications Brand Tern Model Sidekick Doublewide Decks Type Foldable side cargo / passenger decks Capacity — per side 50 kg (110 lb) Capacity — combined (QuadStruts) 100 kg (220 lb) Capacity — combined (stock kickstand) 80 kg (176 lb) Set weight 3.2 kg (7.1 lb) per set Material Aluminium Dimensions per deck 550.5 × 240 × 32 mm (21.7 × 9.4 × 1.3 in) Deck width 25 cm (10 in) Fold Yes — stows flat; stores in front of or behind Cargo Hold 52 Panniers Required accessory Lockstand Extensions — mandatory for installation Optional upgrade Lockstand QuadStruts — raises combined capacity from 80 kg to 100 kg Passenger use Yes — see Tern Passenger Guide for required safety accessories Compatibility Tern GSD only $60 CAD Tern Sidekick Doublewide Decks · GSD · 50 kg Per Side · 100 kg Combined · Foldable · Set of 2 Tern © 2026 Sidekick Doublewide Decks Show more