Tubolight says their Diamana will not be solely the quickest & lightest mountain bike tire liner available on the market – however in addition they declare it’s “the winningest tire insert [on the] World Cup, and the one one successful in each downhill and cross-country“. Its secret although is NOT simply its mild weight or some distinctive materials. Tubolight says that it’s the particular shaping of their Diamana liner that manipulates the circulation of air molecules INSIDE your tire to raised management native tire compression & rebound as you roll over tough terrain.
Tubolight Diamana is the quickest, most superior MTB tire liner
I’m all the time a bit skeptical of a product we’ve not heard a lot of, claiming to be the quickest and winningest. However apart from sealant itself, tire liners are the least outwardly seen part on a race bike. (To be honest we did hear about, however not bodily see them on Thibaut Daprela’s Commencal Supreme DH V5 downhill race bike final summer season in Leogang.)
So we’ll simply take Tubolight’s phrase for it on the wins if solely based mostly on the rainbow jersey images of 2021 XC World Champ Evie Richards, 2021 Olympic Gold medalist Jolanda Neff, and 2021 DH World Champ Myriam Nicole on their homepage. To not point out 2021 XC World Cup #1 Mathias Flückiger and 2022 DH World Cup #1 Amaury Pierron. These 5 riders alone have apparently racked up a slew of wins on Tubolight tire liners in addition to a number of different riders on 5 strong MTB groups. There’s additionally the curious sponsorship of professional conti street crew Q36.5, since Tubolight’s high Diamana tech isn’t but accessible in street tire sizes.
So, everyone knows about MTB tire liners. What makes a Tubolight Diamana liner completely different?
What occurs inside a mountain bike tire while you hit an impediment?
Many mountain bikers are on board with the concept tire liners could make you quicker in the long term. You get improved low-pressure grip & decrease rolling-resistance with out shedding time trailside fixing flats. However Italian tire liner maker Tubolight has a extra nuanced tackle how tire liners could make you quicker…
When your mountain bike tire hits an impediment, the tire deforms on the website of affect. That regionally will increase the air stress within the tire, which in flip rapidly rebounds, bouncing the tire again out towards the purpose of affect. This will typically occur faster than the bike’s suspension may even begin to react.
Decrease tire pressures and supple tire casings can delay that quick rebound. However there’s solely so low or supple you’ll be able to go with out sacrificing stability, management, or sturdiness – even with most typical tire liners, that are already a giant enchancment.
How does the Diamana answer work? And why?
The Tubolight Diamana goals to primarily create 2 layers of air stress contained in the tire quantity and to manage the pace at which air flows from one to the opposite. This creates a twin good thing about slowing native tire rebound with decrease outer stress close to the location of affect and spreading the pressure additional across the rim for higher affect safety with the next stress zone subsequent to the rim.
From the aspect, the blue Tubolight Diamana doesn’t look something like different liners. Its undulating form rises and falls in waves across the wheel, leaving gaps of area above the rim. From an angle, you’ll be able to see the distinctive scooped nature of the Diamana liner, with dimpled ‘star’ shapes stacked on high of one another.
Tubolight claims that when an affect hits the tire from the surface, these scoops direct airflow into the rim mattress beneath the liner through these lateral channel openings. Their form takes benefit of the Venturi impact to hurry up and compress the air because it strikes beneath the liner. The dimples additionally declare the identical boundary separation precept we see on golf balls and Zipp wheels, so extra air goes into the lateral channel openings, and doesn’t replicate again into the primary tire quantity.
Which means air flows into the rim nicely quicker than it will probably escape, delaying the quick rebound impact that in any other case makes the tire bounce off an impediment.
Tubolight’s claimed outcomes?
The obvious result’s the native air stress within the tire doesn’t improve almost as a lot on the website of an affect, so there’s a a lot slower native rebound or bounce.
Which means the deformed tire will proceed to remain connected to the irregular floor floor for improved grip and management. Tubolight claims a “huge 60%” improve of constant stress in opposition to the bottom for next-level traction. The slower rebound additionally claims 55% increased vibration damping, resulting in decreased rider fatigue and a smoother trip.
They in the end say Third-party testing confirms as much as a 9% rolling-resistance discount over tough surfaces.
Tubolight Diamana liners are made from high-density closed-cell EVA foam – assured 100% absorption-free to work with any sealant. Relative to different liners, further foam hardness for the Diamana liners is critical to make sure they keep their distinctive form for optimized air motion contained in the tire, and to ship “years” of dependable efficiency. This “results in the longest-lasting tire insert ever made” in line with Tubolight, “even after lengthy runflat rides“.
These distinctive Diamana liners can be found in three completely different variations, with completely different thicknesses & densities to swimsuit mountain bike using from XC to DH. Their distinctive form additionally ensures they can be utilized with any tubeless valves.
Tubolight Diamana tire liners – Pricing, choices & availability
Diamana SL is the softest, thinnest & lightest for cross-country racing – at a claimed 97g per tire in 29″ solely.
The thicker, medium-hardness Diamana HD is essentially the most common all-rounder tire liner at 145g in 29″ solely, meant for rear downcountry, or entrance path, enduro & DH tires.
Lastly, Diamana XHD options the thickest liner with the toughest EVA compound, particularly for use with bolstered casing tires. XHD is available in each 27.5″ (205g) and 29″ (220g) sizes to swimsuit hard-charging enduro & DH race bikes, in addition to heavier eMTBs.
Tubolight Diamana tire liners are bought direct from Tubolight, accessible for 100€ solely in pairs. In the meanwhile, solely the 29″ SL+SL, SL+HD & HD+HD pairs are in inventory. XHD liners usually are not at present accessible.