Quick Answer: Buying trampoline replacement springs comes down to one measurement: the hook-to-hook length of your existing spring, unstretched, taken directly off the frame — not the trampoline’s advertised diameter. Sizes commonly run 3.5 to 9 inches in quarter-to-half-inch steps, and the same frame size ships with different spring lengths across brands. For most backyard trampolines, the SkyBound Premium Zinc-Plated Springs (12-48 packs, $22.89-$37.00, gold zinc coating plus a free spring tool) are the best overall buy. Budget shoppers do well with SkyBound’s Standard Silver Springs ($29.90-$35.54), and the Machrus Upper Bounce Heavy-Duty set ($25-$36, sets of 15) covers the widest range of odd sizes, including 3.5 and 4.5 in. Springs run 5-8 years before individual ones need swapping — replace them as they fail, not as a full set.
A flat or uneven bounce is almost always a spring problem before it’s a mat problem, and it’s one of the cheapest fixes on a backyard trampoline — a full set runs $20 to $40 against $350+ for a new trampoline. The catch is sizing: springs are sold by hook-to-hook length, and that number varies by brand and frame even at the same advertised diameter. This guide covers how to measure correctly, then names the sets worth buying.
Replacement springs compared
| Springs | Best for | Price | Sizes | Pack sizes | Coating |
|---|---|---|---|---|---|
| SkyBound Premium Zinc-Plated Springs | Best overall | $22.89-$37.00 | 3.5-8.5 in | 12, 24, 36, 48 | Gold zinc + rubber tip, tool included |
| SkyBound Standard Silver Springs | Best budget | $29.90-$35.54 | 6.5-8.5 in | 12, 24, 36, 48 | Galvanized zinc |
| Machrus Upper Bounce Heavy-Duty Springs | Best odd-size range | ~$25-$36 | 3.5-9 in | 15 (some sizes 12) | Galvanized or stainless steel, tool included |
By the numbers
- 3.5 to 9 inches is the common consumer spring-length range across SkyBound and Machrus catalogs, in roughly quarter- to half-inch increments — the same 14 ft frame can use 5.5 in or 7 in springs depending on brand (SkyBound, Machrus).
- $22.89 to $37.00 is SkyBound’s current price spread on premium zinc-plated springs across 12- to 48-packs (SkyBound USA).
- 5 to 8 years is the typical service life before individual springs start needing replacement, per our own replacement parts guide — well outlasting the 2-3 year clock on the net and spring pad.
- 8, 10 or 12 poles’ worth of springs — most consumer 12-15 ft frames use 60-108 springs depending on model, which is why sets are sold in bulk packs of 12 to 48 rather than as singles.
How to measure before you order
- Find one existing spring you can access easily — ideally one you’re already planning to replace.
- Measure hook-to-hook, unstretched, with the spring still on the frame at rest, not pulled taut. Round to the nearest half inch.
- Match that number to a listing, not your trampoline’s advertised frame diameter. A 14 ft round trampoline is a frame size, not a spring size.
- Count how many you actually need. Replacing individually as springs fail means you rarely need a full 48-pack — a 12-pack covers most one-off or small-batch repairs.
- Check the hook style against your current spring. The overwhelming majority of consumer trampolines use a simple open hook, but a small number of premium designs (Springfree’s composite rods, for instance) don’t use hook springs at all and aren’t compatible with any product in this guide.
1. SkyBound Premium Zinc-Plated Springs — Best Overall
SkyBound Premium Replacement Trampoline Springs
- Gold zinc coating over galvanized steel — a second protective layer against moisture, acids and oxidation beyond standard galvanizing.
- Rubber-coated hook tips, which help keep springs seated on the frame and reduce the chance of them working loose over time.
- Ships with a spring tool, so a first-time buyer doesn't need a second order to install safely.
- Widest size range in this guide — 3.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5 and 8.5 in, in 12/24/36/48-count packs.
This is the default answer because it removes the two most common mistakes at once: ordering the wrong length and ordering springs without a way to safely install them. The gold zinc layer is worth the small premium over standard galvanized if the trampoline sits in direct sun and sprinkler range for most of the year — moisture plus UV heat is exactly the combination that accelerates rust at the hook, which is the point where a weakened spring is most likely to fail. Measure your existing spring first, then buy the closest matching size in the smallest pack that covers what you’re actually replacing. Order before the weekend and springs, a pad, or a net can be on your porch in two days instead of waiting on standard shipping — try Amazon Prime free for 30 days. More on the tool itself in our best trampoline spring tool guide.
2. SkyBound Standard Silver Springs — Best Budget
SkyBound Standard Silver Galvanized Trampoline Springs
- Straight galvanized zinc coating without the gold-tone upgrade layer — adequate rust resistance for drier climates and covered or seasonal trampolines.
- Available in the four most common consumer lengths: 6.5, 7.0, 7.5 and 8.5 in.
- Priced close to the premium line at smaller pack counts, so the savings show up more at 36- and 48-packs.
If your trampoline is covered in the off-season, stored indoors over winter, or lives somewhere dry, the extra zinc layer on the premium line buys less than it does for a trampoline that’s outside and wet year-round. The standard line uses the same base galvanizing and the same hook geometry, just without the gold-tone coating and rubber tips — a reasonable trade for anyone replacing a large batch at once and watching the per-unit cost.
3. Machrus Upper Bounce Heavy-Duty Springs — Best Odd-Size Range
Machrus Upper Bounce Premium Trampoline Springs
- Widest length range of any brand checked here — down to 3.5 in for mini trampolines and up to 9 in for larger frames, in both galvanized and stainless steel finishes.
- Sold in sets of 15 rather than SkyBound's 12/24/36/48 tiers, which lines up better if your frame uses an odd spring count.
- Includes a pull T-hook installation tool with every set.
- Stainless steel option available at some lengths for buyers who want the highest rust resistance regardless of price.
Machrus is the pick when your measurement lands outside SkyBound’s standard lengths — 3.5 or 4.5 in for a mini trampoline, or 9 in for a larger frame. The stainless steel option, where available, is the most corrosion-resistant spring in this guide, worth the added cost for coastal or high-humidity locations where even gold zinc coatings eventually show surface rust. See our best mini trampoline guide if you’re sourcing parts for a rebounder rather than a full-size backyard frame.
Buying springs vs. buying a new trampoline
Springs are one of the cheapest parts to replace relative to what a full trampoline costs. A 12-pack runs $20-$40; a new mid-range 14 ft trampoline runs $350-$700, per the pricing in our trampoline replacement parts guide. Unless the frame itself is rusted through at a weld point, replacing springs on a sound frame is close to always the better economics — the frame carries the longest warranty of any component (10-15 years from most major brands) and is the part that rarely actually fails.
The bottom line
Measure hook-to-hook before you shop — that single number matters more than brand or price. For most backyard trampolines, SkyBound’s Premium Zinc-Plated Springs ($22.89-$37.00) are the best overall buy: widest common-size range, a tool included, and a coating built for outdoor exposure. Go with the Standard Silver line if your trampoline stays dry or covered most of the year, and check Machrus Upper Bounce first if your measurement falls at the short end (3.5-4.5 in, mini trampolines) or the long end (9 in) outside SkyBound’s range. Replace individually as springs fail rather than swapping the full set on a schedule.
Sourcing other parts at the same time? See our best trampoline spring tool guide for safe installation, our best trampoline spring cover guide since the pad wears out faster than the springs underneath it, our best trampoline replacement net guide and best trampoline replacement mat guide for the other wear parts, our trampoline replacement parts guide for the full part-by-part lifespan breakdown, our trampoline maintenance guide for the seasonal inspection routine that catches a bad spring early, and the best trampoline guide if you’re weighing a repair against buying new.