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On the topic of changing, non-standard “standards” in the bicycle industry, we share consumer frustration with the wasteful and short-sighted practices of proprietary dimensions, limited functionality, and planned obsolescence that large component companies engage in.

The existence of multiple front axle dimensions has been one of those frustrations. For using 15TA front hubs/wheels with 12TA forks, the PDXTI-12-15-TA Adapter provides a simple, inexpensive, and lightweight solution. Going the other direction — using 12TA wheels with a 15TA fork — is however not as simple.

Thankfully, we are now able to offer a solution for cyclists with one of the many titanium and steel forks that have been built with Paragon DR0049 titanium or DR2051 steel and similar 15TA front flanged/hooded dropouts with threaded axle inserts.

Developed in collaboration with PDXTI and now available in the web store, these threaded fork dropout inserts convert titanium and steel forks with the aforementioned 15TA dropouts into 12TA forks.

At its base this product consists of a pair of externally threaded left hand M22 x 1 inserts, one with a 12mm thru hole and the other internally threaded M12 x 1.5 for 12mm Thru Axles.

Available as inserts only, with traditional QR lever axle, or with lightweight @robertaxleproject thru bolt.

Inserts Only: 22g

Inserts + Bolt-On Axle: 51g

Inserts + QR Axle: 98g

Shimano Asymmetric 110 4-Bolt BCD Adapter for 130BCD chainrings

Shimano Asymmetric 110 4-Bolt BCD Adapter for 130BCD chainrings

As urban and utility cycling has continued to transition from a long ignored market to a major driver of retail and aftermarket sales more and more bicycle industry R&D is being shifted from niche race bikes to those with more practical applications.

Many of the urban/utility developments have come in lock-step waves as bicycle components have a high reliance on widespread compatibility. Case in point: as more advances have been made with internally geared hubs (IGH) there have been corresponding moves toward low-maintenance solutions such as the belt drive systems offered by GatesSchlumpf, and Veer.

Today there are of course ever increasing options for urban/utility cyclists, from car replacing cargo bikes to ultra minimalist eBikes. While recent advances in manufacturing technology have seen generally solid improvements in weight and durability of bikes and parts, one area of the urban/utility market that has not kept pace with the wider cycling world is the trickle down of new materials and technology. Even at price points reaching into the thousands of dollars, "commuter" bikes are generally still sporting cranksets that weigh 800 grams or more.

We continue to rely heavily on modern products such as Gates Carbon Drive for offering our customers the best value available. Being able to run the 130BCD Gates chainrings with the relatively lightweight and affordable new Shimano Ultegra R8000 crankset or the higher end Dura-Ace R9100 part would be a great step up from the typical clunky commuting cranks but without the steep price point of carbon fiber parts.

The catch, of course, is that proprietary non-compatibility is as baked into cycling as it is any industry, and the newest Shimano cranks use a stand-alone asymmetrical bolt circle diameter (BCD) that only a handful of aftermarket manufacturers have addressed. Gates Carbon Drive is not one of them, and their Centertrack rings are only offered in 104BCD (for mountain cranks) or 130BCD (for traditional road cranks).

Expanding our line of BCD adapters to include a solution for the Shimano Asym 110 4-bolt system has been on our radar for a while, and a recent custom order provided the necessary push to make it a reality.

Shimano Asymmetric 110mm 4-Bolt to 130mm BCD ADAPTER
Add To Cart

Add To Cart or find out more on the Shimano Asymmetric 110mm 4-Bolt to 130mm BCD Adapter product page.

Shop Tools: DR4050-Series Insert Driver

Shop Tools: DR4050-Series Insert Driver

Threading in the inserts for 15mm Thru-Axle fork inserts is a mild pain with a regular pin spanner. The tool holes on the outside face are larger diameter than most spanners and since the dropouts are hooded it is necessary to lean the tool to clear the fork leg on each rotation as the insert threads in. It just feels sloppy and it is easy for the tool to slip and mar the insert face.

Granted this is one of those small annoyances, but having a snug and convenient tool for tightening down fork inserts is inversely satisfying.

Dave came up with a quick fix using an old socket with a knurled holder and a quartet of M5 bolts turned down to pins of the appropriate diameter.


PDXTI 12-15mm TA Adapter

PDXTI 12-15mm TA Adapter

With multiple front hub standards now in play, it make sense to stay modular and keep your options open. This brilliant adapter from PDXTI is extremely light weight 3K carbon weave that allows the use of a standard 15mm x 100mm MTB/CX wheel with a 12mm x 100mm thru axle Road/CX fork.

Easy as pie: The adapter slides into a 15mm hub, allowing the wheel to be mounted and secured to a 12mm thru axle fork. 

1) Slide 12-15-TA Adapter into 15mm hub.
2) Install wheel into fork as normal.
3) Install 12mm thru axle as normal.

In stock and available now. Click on the product for full details.