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North Shore Billet

2x 104 BCD Spider for SRAM Cranks

2x 104 BCD Spider for SRAM Cranks

Regular price $84.00 USD
Regular price Sale price $84.00 USD
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Bottom Bracket Type

Need a smaller granny ring for those steep climbs and all-day epics?

The NSB 2× Spider replaces the stock chainring spider so that you can run smaller chainrings on SRAM XX1, X01, X1, X0, X9, X7, and GX cranks.

With the NSB 2× Spider, you can run a more traditional 22/32T or 24/34T combination. The spider is designed to use any standard 64/104 BCD chainring. The distance between the rings and the distance from the centre of the bottom bracket is the same as the 120 BCD spider, so the setup is simple, and the shifting is quick!


  • Middle Ring Chainline: 52mm
  • Granny Ring Chainline: 44mm
  • Compatible with SRAM 3-bolt DM system
  • Machined from solid 6061 Aluminum
  • Anodized Black with Laser Etched Graphics


Why do I need this?

The standard 120 BCD spider does not allow for ring combinations any lower than 26T/39T.  You may want to run a smaller climbing ring if you live in a mountainous area with big climbs.

What chain should I use?

You need to match the chain to the cassette. In most cases, your cassette will be 10-speed, so you will need a 10-speed chain. If you wish to use the NSB 2 × 10 Spider with a 9-speed cassette, then you will need to use a 9-speed chain.

What is the difference between 9-speed and 10-speed chains?

Very little. The difference is the overall width of each link. The 9 and 10-speed chains share the same pitch and internal width. The outer link plates on the 10-speed chain are thinner than the 9-speed chain to fit the smaller gap between the cogs on the 10-speed cassette.

What chainrings should I use?

You can use any standard 9 or 10-speed chainrings. We tested Shimano, Truvativ, and RaceFace rings on our Spider.

What is the difference between 9 and 10-speed chainrings?

There are several major differences. Most 10-speed chainrings are 120 BCD and standard 9-speed chainrings are 64/104 BCD. Also, some do not mount to the crank arm spider with the traditional nut and bolt but are threaded and use a chainring-specific bolt. In addition, the spacing of the rings on the crank arm spider is different between 9-speed and 10-speed cranks. What is the same is the tooth thickness which means you can run a 9-speed chainring with a 10-speed chain.

Do I need to replace my front derailleur?

No. The NSB 2×10 Spider is designed to be used with SRAM 2 × 10 front derailleurs.

Will the NSB 2×10 Spider fit an X0 or X9 BB30 cranksets?

Yes, we have two specific models for BB30 cranks.

How do I install the NSB 2×10 Spider?

Remove the existing spider and rings and replace them with the NSB 2×10 Spider with two new chainrings of your choice. You may have to move the front derailleur down towards the largest ring (depending on what rings you would like to install). Check your front derailleur alignment and adjust accordingly.

Will the NSB 2×10 Spider work with the S2210 crank?

Yes, the NSB spiders are compatible with the S2210 cranks that are commonly found on Specialized bikes. The S2210 is an OE crank that is virtually the same as the X0 crankset.

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