Tern Sidekick Lower Deck

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Gen 1 only: later GSDs have lower decks built in. $95 CAD · per pair Fits the GSD Gen 1 and nothing else. The GSD Gen 2 and Gen 3 already have lower decks integrated into the frame, so this pair has nowhere to mount and no job to do. If you have a Gen 2, the equivalent upgrade is the Sidekick Wide Decks ($215 per pair), which widen the built-in decks to 12 cm. For a Gen 3 or another Tern cargo bike, the Stow Decks ($234 per set) are the adjustable equivalent. Check which generation you have before ordering. Carrying a child on the decks also requires the seat, guard, and restraint accessories set out in Tern's Passenger Guide — a footrest on its own does not make a bike passenger-ready. 50 kg combined — 110 lb 25 kg (55 lb) per deck GSD Gen 1 fitment — no other bike 1.08 kg per pair — 2.4 lb The GSD Gen 1 has a long rear rack and no shelf beneath it, which leaves the space between the rack and the rear axle unused and a passenger's feet with nowhere to rest. The Sidekick Lower Decks fill that gap with a pair of aluminium shelves that bolt low on the frame, one per side. The design decision worth understanding is the height: everything on these decks rides close to the axle rather than up at rack level, so a heavy load changes how the bike steers far less than the same weight carried on top. That makes them the better place for the dense, awkward items — a case of drinks, a bag of tools, a sack of soil — and it is what the shelves are really for. Serving as a passenger footrest is the second job, not the first. Later GSD generations build this shelf into the frame, which is why this pair is a Gen 1 part only. Highlights Weight rides low, so the bike still steers like a bike Load carried high on a rack acts as a lever against the steering, and a loaded cargo bike gets noticeably twitchy at low speed and in crosswinds. Sitting the same weight down near the axle keeps the centre of mass under you. It is the single biggest handling difference between a well-packed cargo bike and a badly packed one. A defined place for a passenger's feet A child riding with their legs dangling will eventually find the spokes or the rear wheel with a heel — the reason footrests exist on cargo bikes at all. A fixed deck gives them somewhere to brace, which also stops the constant shifting that makes a passenger feel unstable behind you. Pair it with the Sidekick Wheel Guard L (Gen 1) so the wheel itself is covered. 25 kg per deck is real cargo capacity, not a token shelf Each deck takes 25 kg and the pair 50 kg, which covers a full grocery run or a load of building materials on its own — before anything goes on the rack above. Balance across both sides rather than loading one: an even split is what the combined figure assumes. Works with Cargo Hold panniers rather than against them The decks are sized to sit under the Cargo Hold pannier line, so you can run panniers and still use the shelf underneath. Bulky items that will not fit in a pannier go on the deck; the pannier keeps carrying what it always did. You are not choosing between the two. Which deck fits which GSD Three generations, three answers. GSD Gen 1 takes these Sidekick Lower Decks ($95 per pair) — it is the only generation without a built-in shelf. GSD Gen 2 has decks already, so the upgrade is the Sidekick Wide Decks ($215 per pair) at 35 kg each, widening the platform to 12 cm for bigger feet, or the folding Sidekick Doublewide Decks ($60). GSD Gen 3 and Tern's other cargo bikes take the Stow Decks ($234 per set), which add five angle positions and mount front or rear. Identify the generation first — nothing in this family crosses between them. Specifications Brand Tern Model Sidekick Lower Decks Type Lower side decks — cargo shelf and passenger footrest Material Aluminium Capacity — per deck 25 kg (55 lb) Capacity — combined 50 kg (110 lb) Set weight 1.084 kg (2.4 lb) per pair Dimensions per deck 519 × 123 mm (20.4 × 4.8 in) Sold as Pair — both decks included Pannier compatibility Cargo Hold Panniers Passenger use Additional accessories required — see Tern Passenger Guide Recommended companions Sidekick Wheel Guard L (Gen 1) · Sidekick Seat Pad ($90 each, Gen 1) GSD Gen 2 equivalent Sidekick Wide Decks ($215 per pair) — 35 kg each, widens integrated decks to 12 cm Other Tern cargo bikes Stow Decks ($234 per set) — 35 kg per side, 5-angle adjust, front or rear Also available Sidekick Doublewide Decks ($60) — folding, GSD Gen 2 Compatibility Tern GSD Gen 1 only — verify with Tern's compatibility checker $95 CAD · per pair Tern Sidekick Lower Decks · 25 kg Per Deck · Aluminium · GSD Gen 1 Tern © 2026 Sidekick Lower Decks Show more