Wolf Tooth 130 BCD Road / Cyclocross Drop-Stop Chainrings
Wolf Tooth was first to market with Cyclocross 1x specific chainrings because we saw Cyclocross as the perfect use for our Drop-Stop® technology.
Since their release, the uses for these rings has expanded beyond Cyclocross to commuting, gravel riding, and even full on Road applications with the giant 52t rings!
- These rings are for use with 130 BCD 5 arm cranksets. Here is how to measure your BCD.
- Do NOT fit on the cranksets for Shimano DA 9000 / Ultegra 6800
- Not compatible with Campy CX10/11.
- Can be mounted in either the big or small ring position of a double crankset given chainstay clearance in the small ring position.
- 38T important note: The chain may contact the spider arm slightly when using the 38T chainring (see last photo in the product images).
- We recommend filing a small chamfer on the spider arm but you can also just install it and let the chain do the work. This is only an issue with the 38T as the 130 BCD was designed for 39T smallest ring.
- For 1x9, 1x10, 1x11 and 1x12 drivetrains (including SRAM Eagle)
- Compatible with all 10, 11, and 12 speed chains (Including SRAM Eagle)
- If using a 9 speed drivetrain use a 10 speed chain (shifts and works well on a 9 speed drivetrain and fits the ring tighter for better chain retention).
- Design and manufactured in the Minneapolis, MN USA
- Wolf Tooth’s patent pending Drop-Stop® wide/narrow tooth profile for the ultimate chain retention and mud shedding ability
- Recommend the use of a clutch style rear derailleur for the best chain security.
- Material 7075-T6
- Colours - black
- Chainline - varies - these rings can be mounted in either the big or small ring position on a double cranksets. The most common mounting is in the big ring position because of chainstay clearance. The ring centreline is ~2mm from the ring's mounting face so they usually sit about 2mm closer to the frame than the stock big ring (depends on the stock ring)
- If you plan to ride in very muddy conditions, we recommend a chainguide or chainkeeper in addition to a clutch-type rear derailleur! Without these precautions, you may experience chaindrops and/or chainsuck.
About the Wolf Tooth Drop-Stop design:
Wolf Tooth Components are the best performing and longest lasting wide/narrow chainrings on the market, and that is no accident. We've put countless hours into designing, prototyping, and testing to come up with our innovative new tooth profile, which is pending multiple patents. Test riders all over the world have confirmed that this design provides unparalleled performance. Here are the details of WHY it works:
Asymmetric tooth shape:
This is a close up view of our new tooth profile. Notice that right side of the tooth has a very different shape than the left side. The right side of the tooth transmits force to the chain and the left side provides clearance for mud and debris. Since they have completely different functions it makes sense that they are designed differently. Extra strength where you need it, less material where you don't:
This picture shows a top and side view of our chainring with a chain so you can see how they fit together. Notice that the right side of the tooth is as wide as we can make it to maximise amount of area in contact. More area in contact means the load is spread over a larger area which in turn minimises wear on the tooth. The left side of the tooth helps to guide the chain as it meshes with the chainring but it does not have to transmit any load. The left side of the tooth is narrower than the roller pin on the chain. Wear is not a concern on this side of the tooth so we removed extra material to create a channel for mud to flow away. More clearance means less friction and less chance of mud causing a dropped chain.
This cross section shows the mud purging channel that allows Drop-Stop chainrings to rip through mud without dropping the chain. Notice how the extra relief on the left side of the tooth provides room for mud to flow. Mud relief cutouts on the valleys between the teeth provides space for mud to flow between the chain plates and chain roller. All surfaces are angled so there are no sharp corners for mud and grease to build up.