Inner Tubes

CYCLAMI Inner Tubes • Ultralight TPU MTB Road Official Store

Rotational weight is the most expensive weight on a bicycle — every gram saved at the wheel rim and tire requires significantly less effort to accelerate and sustain over climbs. CYCLAMI Inner Tubes attack this problem directly with thermoplastic polyurethane construction that delivers a verified weight of 35-55 grams per tube depending on size, compared to 90-120 grams for a standard butyl equivalent. The complete lineup covers six sizes spanning common road diameters from 700c x 23-32mm through to MTB formats at 29 x 2.0-2.4 inches. Both Presta valve configurations are available, with valve lengths of 42mm and 60mm to suit shallow and deep-section rims. TPU material maintains airtightness at pressures from 25 PSI for trail MTB use up to 130 PSI for high-pressure road applications. Each tube ships folded to a compact size smaller than a standard energy bar, making saddle bag storage straightforward without compromising other carry essentials. For riders who want measurable performance gains without changing tires or wheels, upgrading the inner tube is the highest-value single modification available.

TPU Material Technology and Why It Outperforms Butyl

Thermoplastic polyurethane is a polymer with a molecular structure that delivers higher tensile strength per gram than butyl rubber, which is the chemistry behind the dramatic weight reduction. Butyl relies on thick walls to achieve acceptable airtightness, while TPU achieves superior air retention through material density rather than wall thickness, allowing wall profiles as thin as 0.4mm. Air permeability tests show TPU tubes retain pressure up to three times longer than butyl equivalents under identical conditions, reducing how often you need to top up before a ride. The material resists UV degradation and ozone cracking — failure modes that shorten the service life of butyl tubes stored in exposed conditions. Puncture resistance in TPU is higher than butyl at equivalent wall thicknesses because the polymer stretches under impact rather than tearing, absorbing road debris strikes without immediate failure. Elasticity recovery after stretch is also superior, meaning the tube returns to its original dimension correctly after installation rather than developing stress concentrations at fold points. These material properties make TPU the technically correct choice for road cyclists and MTB riders who want a best-in-class inner tube that lasts longer and performs better.

Performance Gains Over Standard Butyl and Latex Alternatives

A 60-gram weight saving per wheel, achievable by switching from butyl to ultralight TPU inner tubes on a road bike, is equivalent to removing 120 grams of rotational mass from the system — a change measurable in watt-hours on timed climbs. Latex tubes offer similar weight savings but require daily inflation checks due to high air permeability and degrade rapidly from ozone and UV exposure, creating a maintenance burden TPU eliminates entirely. Rolling resistance measurements on calibrated drum testers show TPU tubes produce 1-2 watts less resistance per tube compared to standard butyl at equivalent pressures, a compound advantage across both wheels. The trusted brand behind this lineup has verified these figures through third-party testing, with data available on the official store product pages for direct comparison. Installation follows the same process as butyl — no specialized tools, no change to your existing tire levers or pump — so the upgrade requires zero additional investment in equipment. Compatibility with tubeless-ready rims is confirmed, allowing riders who want a lighter backup option to carry a TPU tube without needing a separate wheel set. Choosing TPU over butyl or latex is a straightforward performance decision supported by measurable data rather than marketing claims.

How to Select the Right Size and Order From the Official Store

Correct tube sizing starts with the numbers printed on your tire sidewall — a tire marked 700c x 28 requires a tube rated to cover that diameter and width, and using a tube outside that range creates installation stress that accelerates failure. MTB riders should confirm inner width compatibility between tube and rim, particularly on plus-size setups where rim width affects optimal tube volume. Valve length selection depends on your rim depth: standard clincher rims work with 42mm valves, while aero or deep-section rims above 40mm depth require 60mm to allow full pump chuck engagement. Carrying one spare CYCLAMI tube per ride is the recommended practice, sized to match your primary tire format, stored in its compact folded state inside the saddle bag. Where to buy matters — purchasing through the official store guarantees genuine TPU construction, correct sizing labeling, and full manufacturer support if any issue arises. The best price on all six tube sizes is consistently available through the official store, with no minimum order quantity for single tubes or multi-pack options. Order online now, install a set before your next ride, and measure the difference that ultralight TPU inner tube technology delivers on the first climb.