A spare inner tube belongs in an eMTB repair kit even when the wheels normally run tubeless. A damaged valve, failed tape or a cut that will not seal can leave you needing a conventional way home. The best tube is one that fits the tyre and rim, is easy to carry, and works with the repair supplies already in your bag.
The best spare inner tubes: shortlisted
Schwalbe SV19 – £4,99 (RRP £9.99)
Pirelli Sportube MTB – £3.50 (RRP £7.99)
Continental MTB 29 – £4.99 (RRP £8.99)
Michelin Airstop 29 – £6.99
Continental MTB Light – £7.20 (RRP £14.99)
Schwalbe Air Plus SV19+AP – £8.59 (RRP £14.99)
Michelin Protek Max MTB – £11.99 (RRP £14.99)
Pirelli Scorpion SmarTUBE – £20.99 (RRP £29.99)
Our eight choices cover ordinary butyl, thicker butyl, self-sealing and compact TPU tubes. Each card identifies the exact variant. A lower price for another wheel size or valve is not a useful comparison if it will not fit your bike. For choosing the tyre itself, start with our eMTB trail tyre guide.
Best Overall: Schwalbe SV19
For compatible tyres, the SV19 is the easiest general-purpose recommendation here: it combines broad diameter coverage with familiar butyl repairs and a modest price. Its 29in width limit is 2.4in, so riders using wider tyres should choose the wide Michelin Airstop or a suitable Air Plus instead.
Schwalbe SV19
A conventional, repairable spare for compatible 27.5in and 29in tyres.
At Tredz
27.5/28/29in; 40mm Presta
+ Pros
- Broad size coverage
- Ordinary butyl patches suit trail repairs
- Low replacement cost
− Cons
- Bulky beside a TPU tube
- Does not cover every wide eMTB tyre
Compare prices
27.5/28/29in; 40mm Presta
Prices and availability may change. Prices last checked: 2026-10-09 13:20 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
Our best overall spare for riders whose tyres fall within its printed size range. Its broad diameter coverage makes it useful on many mixed-wheel bikes, while ordinary butyl construction keeps repairs straightforward. Check each tyre width before relying on one tube for both wheels: a 29 x 2.6in tyre falls outside the stated 29 x 2.4in upper fit.
Key specifications
- Material
- Butyl
- Wheel fit
- 27.5/28/29in
- ETRTO
- 40/62-584/635
- Valve
- 40mm Presta
- Listed weight
- 220g
The best spare inner tubes
Pirelli Sportube MTB
An inexpensive butyl backup for a compatible 27.5in rear wheel.
At Tweeks Cycles
27.5 x 2.1–2.4in; 48mm Presta
+ Pros
- Lowest-priced option here
- Familiar butyl repair method
- Useful on compatible mullet rear wheels
− Cons
- Not a 29in spare
- Too narrow for many 2.5–2.6in eMTB tyres
Compare prices
27.5 x 2.1–2.4in; 48mm Presta
Prices and availability may change. Prices last checked: 2026-10-09 13:11 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
Choose this when the size matches your rear tyre and keeping a conventional spare affordable matters most. It makes a sensible backup for a 27.5in wheel, but its 2.4in upper width is a real restriction. Riders with wider rear tyres should move to a model whose printed range covers them, rather than choosing on price alone.
Key specifications
- Material
- Butyl
- Wheel diameter
- 27.5in / 584mm
- Tyre width
- 2.1–2.4in
- Valve
- 48mm Presta
- Pack
- One tube
Continental MTB 29
A straightforward butyl spare for compatible 29in tyres.
At Tredz
29 x 1.75–2.5in; Presta
+ Pros
- Covers many 29in trail tyres
- Conventional patch repairs
- Simple low-cost replacement
− Cons
- Does not cover 2.6in tyres
- No compact TPU packing advantage
Compare prices
29 x 1.75–2.5in; Presta
Prices and availability may change. Prices last checked: 2026-10-09 13:13 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
A practical alternative to the Schwalbe when your bike uses a 29in wheel and a tyre no wider than the stated 2.5in limit. Its conventional construction suits riders who already carry butyl patches. Match the valve version to your rim and confirm that enough valve projects through the rim for your pump before buying.
Key specifications
- Material
- Butyl
- Wheel diameter
- 29in / 622mm
- Tyre width
- 1.75–2.5in
- Valve type
- Presta
- Construction
- Seamless
Michelin Airstop 29
The useful wide-tyre option for 29in eMTBs.
+ Pros
- Covers 2.6in and wider tyres
- Ordinary butyl repair supplies
- No self-sealing compound to manage
− Cons
- Wider tube takes more bag space
- Not suitable for a 27.5in wheel
Compare prices
29 x 2.4–3.1in; 48mm Presta
Prices and availability may change. Prices last checked: 2026-10-09 13:20 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
This is the strongest reason to check width carefully: several cheaper standard tubes stop at 2.4 or 2.5in, while this selected Airstop covers 2.4–3.1in. It is a sensible repair-kit choice for a wide 29in eMTB tyre when the rim accepts its Presta valve. Choose the specified wide variant, since narrower versions on the same retailer page serve a different purpose.
Key specifications
- Material
- Butyl
- Wheel diameter
- 29in / 622mm
- Tyre width
- 2.4–3.1in
- Valve
- 48mm Presta
- Pack
- One tube
Continental MTB Light
A lighter conventional spare for a compatible 27.5in wheel.
At Tweeks Cycles
27.5 x 1.75–2.4in; 42mm Presta
+ Pros
- 145g listed weight
- Conventional patching
- Lower price than the TPU option
− Cons
- 2.4in maximum width limits eMTB fit
- Weight saving is less useful than correct sizing
Compare prices
27.5 x 1.75–2.4in; 42mm Presta
Prices and availability may change. Prices last checked: 2026-10-09 13:20 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
A good fit for riders trying to trim a repair kit without changing to TPU repair supplies, provided the rear tyre sits within its range. The 145g listed weight gives it a clear purpose beside heavier conventional tubes. It is not a universal mullet spare: check both the 27.5in diameter and the 2.4in maximum width.
Key specifications
- Material
- Butyl
- Wheel diameter
- 27.5in / 584mm
- Tyre width
- 1.75–2.4in
- Valve
- 42mm Presta
- Listed weight
- 145g
Schwalbe Air Plus SV19+AP
A thicker butyl choice for riders prioritising air retention.
At Tredz
29 x 2.1–2.6in; Presta
+ Pros
- Fits common 2.6in eMTB tyres
- Thicker construction for air retention
- Conventional butyl patches
− Cons
- Bulkier than a lightweight spare
- Still needs suitable riding pressure
Compare prices
29 x 2.1–2.6in; Presta
Prices and availability may change. Prices last checked: 2026-10-09 13:20 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
Air Plus makes most sense for a bike ridden with tubes, or for a rider who values a substantial conventional backup more than minimum packed volume. The selected SV19+AP covers 2.1–2.6in tyres; the similarly named narrower Air Plus versions should not be substituted. Extra tube thickness does not remove the need for enough pressure to avoid pinching the tube against the rim.
Key specifications
- Material
- Butyl
- Wheel diameter
- 29in / 622mm
- Tyre width
- 2.1–2.6in
- Valve type
- Presta
- Family
- Air Plus SV19+AP
Michelin Protek Max MTB
A self-sealing tube for compatible 27.5in tyres.
At Tredz
27.5 x 1.9–2.5in; 48mm Presta
+ Pros
- Self-sealing design targets small punctures
- Covers tyres up to the listed 2.5in
- Alternative to a plain butyl tube
− Cons
- Cannot guarantee puncture prevention
- Larger and dearer than a basic spare
Compare prices
27.5 x 1.9–2.5in; 48mm Presta
Prices and availability may change. Prices last checked: 2026-10-09 13:20 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
Protek Max is worth considering if you deliberately ride a compatible 27.5in wheel with tubes and want its self-sealing design. It is less compelling as an emergency tube that stays in a bag: a simpler butyl spare costs less and is easier to compare by size alone. Follow Michelin’s inflation and fitting instructions, and do not treat the sealing feature as protection against major cuts or every pinch puncture.
Key specifications
- Material
- Butyl
- Wheel diameter
- 27.5in / 584mm
- Retailer tyre range
- 1.9–2.5in
- Valve
- 48mm Presta
- Design
- Self-sealing Protek Max
Pirelli Scorpion SmarTUBE
A compact TPU backup for disc-brake eMTBs with compatible 29in tyres.
At Tweeks Cycles
29 x 2.2–2.6in; 42mm Presta
+ Pros
- Compact alternative to butyl
- Covers common 2.6in trail tyres
- Useful where repair-kit space is tight
− Cons
- Costs substantially more than butyl
- Needs a suitable TPU repair kit
- Not for rim brakes
Compare prices
29 x 2.2–2.6in; 42mm Presta
Prices and availability may change. Prices last checked: 2026-10-09 13:20 UTC. Prices are checked when this guide is updated. Confirm the current price and availability with the retailer.
Why it makes the shortlist
The compact-spare choice when limited storage makes a conventional tube awkward to carry. Its selected 29 x 2.2–2.6in fit covers many current eMTB trail tyres, but it remains a single-wheel-size spare. Carry a repair kit specifically suitable for this TPU tube and follow Pirelli’s pre-inflation instructions; ordinary butyl patches are not a safe assumption.
Key specifications
- Material
- TPU
- Wheel diameter
- 29in / 622mm
- Tyre width
- 2.2–2.6in
- Valve
- 42mm Presta
- Brakes
- Disc only
Start with diameter, width and valve
Read the tyre markings rather than relying on the bike’s model name. A 27.5in MTB tyre normally uses the 584mm bead-seat diameter; a 29in tyre uses 622mm. Match the diameter and the printed width range on the tube. A 29 × 2.6in tyre is outside a tube labelled only to 29 × 2.4in, even if both products are described as MTB equipment.
Mixed-wheel eMTBs need particular care. A broad-range tube such as SV19 can cover some 27.5in and 29in combinations, but only within its stated width range for each diameter. Two wheel sizes do not automatically mean one spare will cover both. Check the front and rear tyre separately before deciding what to carry.
All selected offers here use Presta valves. Check your rim’s valve hole and whether enough valve remains accessible above the rim for the pump head. A longer valve is useful with a deeper rim, while a valve that barely reaches can turn a simple trail repair into a struggle. Do not drill or improvise a valve-hole conversion at the trailside.
Butyl or TPU for an emergency spare?
Ordinary butyl is the straightforward choice when cost and familiar repairs matter. It packs larger than a lightweight TPU tube, but most riders already have suitable patches. Keep it protected from sharp tools and grit in the repair kit; carrying a spare is only useful if it remains undamaged.
TPU makes sense where storage is tight, such as a small frame bag or an on-bike tool mount. The Scorpion SmarTUBE selected here covers common wide 29in tyres, but it costs considerably more than a basic butyl tube. Use a repair kit approved for the tube material and follow its inflation instructions before installation. Pirelli’s SmarTUBE guidance also specifies disc-brake use for the MTB model.
Thicker and self-sealing tubes serve different jobs
Schwalbe Air Plus is aimed at riders who value air retention and a more substantial conventional tube. Michelin Protek Max adds a self-sealing design. These features can matter on a bike deliberately ridden with tubes, but neither makes tyre cuts or pinch punctures impossible. They are also less compelling if the tube will spend nearly all its time packed as an emergency backup.
Fit the spare carefully and reset your pressure
When converting a failed tubeless tyre to a tube, inspect the inside of the tyre and remove the tubeless valve. Find and remove the sharp object that caused the puncture before fitting the spare. A damaged casing may need a suitable tyre boot, or it may be beyond a safe repair. Follow any insert manufacturer’s instructions: not every insert can stay in place with a tube.
Give a butyl tube just enough air to take shape, avoid twisting it, and check that it is not trapped beneath the bead. TPU pre-inflation limits can be different, so read that tube’s instructions. Our tight eMTB tyre fitting guide explains how the rim’s centre channel creates slack during installation.
A tube fitted after a tubeless failure changes the puncture risks. Return to an appropriate riding pressure using our eMTB tyre pressure guide, stay within the tyre and rim limits, and ride cautiously while checking that the repair holds. For workshop inflation, see our Topeak JoeBlow Tubi 2Stage review.
What to carry with the tube
Pack a compatible pump, tyre-safe levers, a suitable patch kit and a tyre boot. Keep the tube’s valve protected and check the kit occasionally, especially if it has been strapped to the bike through wet rides. Correct fit and a usable repair kit matter more than saving the last few grams.