Wolf Tooth 4 Bolt Alloy Drop-Stop Chainring

If you are in need of a 4 Bolt Chainring, chances are Wolf Tooth have an option to suit. Made from a high-grade 7075-T6 aluminium Wolf Tooth’s Drop-Stop Chainrings are one of the best performing and longest lasting wide/narrow chainring options on the market. 

Chain Retention Technology:

Drop-Stop technology is Wolf Tooth’s patented wide/narrow chainring design. The wide side of the tooth has maximum contact on the drive side which spreads the load and improves chainring life. The narrow side allows clearance for mud and debris which reduces friction. Alternating wide/narrow tooth pattern prevents chain derailment.

The new Shimano 12-speed chain rings use a different technology than Drop-Stop as the Shimano 12 speed chains are not compatible with the standard Drop-Stop tooth profile. The HG+ chain interacts with the chainring differently than a traditional narrow/wide design so Wolf Tooth took the time to understand how the HG+ system worked before they produced their new Shimano 12-speed HG+ compatible chainrings. 

Compatibility and Specs:

102 BCD – Shimano XTR M960:

• These rings only fit on the M960 crankset in the middle ring position
• For 1×10, 1×11 and 1×12 drivetrains (including SRAM Eagle)
• Compatible with all 10-, 11-, and 12-speed chains except Shimano 12-speed chains.
• 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)
• 6mm Chainring bolts needed
• Chainline: 50mm
• Weight:  32T – 47g,  34T – 56g

104 BCD:

• Fits any 104 BCD crankset
• Chainring Bolts: All tooth sizes require 1x bolts that are 6mm long with exception to 30t rings which are threaded and require bolts that are 7-10mm long. Wolf Tooth carries both sizes in a variety of colours
• 104 x 30t – use 10mm bolts
• 104 x 32t, 34t, 36t, 38t use 6mm bolts. 
• If using a bashring you will need 8mm bolts (most stock bolts on 3x cranksets are 8mm)

• 32t 104 BCD chainrings work on many older 2x Shimano crankset (XT, SLX, or Deore)
• The 30t x 104BCD chainring is the only available ring for the QUARQTM power meter
• Drivetrains: 1×9, 1×10, 1×11 and 1×12 drivetrains
• Compatible with all 10-, 11-, and 12-speed chains except Shimano 12-speed chains
• Shimano 12-speed chains require the use of Wolf Tooth’s Shimano 12-speed specific chainrings
• If using a 9-speed drivetrain use a 10-speed chain. It fits tighter for better chain retention
• Weight: 30T – 36g, 32T – 47g, 34T – 56g, 36T – 60g, 38T – 66g

110 BCD – Asymmetrical Shimano:

• Fits 110 BCD Asymmetric 4-bolt cranks
• Compatible with Dura Ace 9000, Ultegra 6800, 105 5800, Tiagra 4703, and Tiagra 4700
• Sizes 38T and larger are compatible with Dura Ace 9100, Ultegra 8000 and 105 R7000 but a slight modification is required due to a change in the crank arm profile. The 36T chainring will not work for this modification. 
• Confirmed modification fit with Dura Ace 9100 Power Meter in size 42t or larger
• Mounts in the big ring position of the cranks but is offset inward for perfect chainline.
• The stock 2x bolts will not work.  You will need Wolf Tooth’s 6mm bolts which are optimized for single ring mounting.

• Drivetrains: 1×9, 1×10, 1×11 and 1×12 drivetrains

  • Compatible with all 10-, 11-, and 12-speed chains except Shimano 12-speed chains
  • Shimano 12-speed chains require the use of Wolf Tooth’s Shimano 12-speed specific chainrings
  • If using a 9-speed drivetrain use a 10-speed chain. It fits tighter for better chain retention
• Chainline  47.5mm
• Weight: 38T – 66g,  40T – 74g,  42T – 81g,  44T – 90g

120 BCD – SRAM 2×10:

• These rings fit any 120 BCD crankset or 4-bolt spider.
• For SRAM cranksets you must use the stock M10x.75 bolts with a shoulder on them. These are not standard bolts and Wolf Tooth’s bolts will not work with this chainring. Note that only about 3 threads will engage (same with the stock SRAM rings)
• The only other supplier of these M10 x .75 bolts is Wickwerks if your crankset doesn’t already have them. These bolts actually have more threads engaged and will work better than the SRAM ones.
• 36t is the smallest number of teeth that fits on a 120 BCD 
• For 1×9, 1×10, 1×11 and 1×12 drivetrains (including SRAM Eagle)
  • Compatible with all 10-, 11-, and 12-speed chains except Shimano 12-speed chains.
  • 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).
• Chainline – 51mm for 36t and 52mm for 38t (38t is wider for more chainstay clearance)
• Weight: 36T – 54g, 38T – 59g

64 BCD:

• Fits any 104/64 BCD crankset (104 BCD is the middle/big position 64 is the smallest ring position)
• The Universal Model fits both 104/64 BCD cranksets and the Shimano 11 speed XT M8000 cranks and SLX M7000 cranks. 

• Drivetrains: 1×9, 1×10, 1×11 and 1×12 drivetrains
• Compatible with all 10-, 11-, and 12-speed chains except Shimano 12-speed chains
• Shimano 12-speed chains require the use of Wolf Tooth’s Shimano 12-speed specific chainrings
• If using a 9-speed drivetrain use a 10-speed chain. It fits tighter for better chain retention

• Chainline (approximate as BB centering and cranksets vary)
• Chainline is 46 mm on a triple and 48 mm on a double crank
• Chainline on a Standard M8000 or M7000 crankset is 48mm and 50mm on a boost version.
• You will use the stock bolts to mount this chainring
• 26T – 42g, 28T – 50g

76 BCD – SRAM XX1:

• These rings fit any SRAM 76 BCD spider or Specialized Stout crankset. 
• Threaded for standard M8 chainring bolts. For the XX1 spider, we recommend the 6mm bolts (or any short M8 chainring bolt). For the Stout crankset we recommend the 10mm bolts or the bolts that come with the crankset.
• For 1×9, 1×10, 1×11 and 1×12 drivetrains (including SRAM Eagle)
  • Compatible with all 10-, 11-, and 12-speed chains except Shimano 12-speed chains.
  • 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).
• Use standard M8 chainring bolts, NOT the M8.5 bolts included with XX1 spiders.
• Weight: 30T – 45g, 32T – 51g

88 BCD – Shimano XTR M985:

• This ring ONLY fits the Shimano M985 “Race” crankset that looks like this:

• The Shimano M980 “Trail” crankset uses Wolf Tooth’s 104 BCD chainrings in stainless steel or aluminium

• For 1×9, 1×10, 1×11 and 1×12 drivetrains (including SRAM Eagle)
  • Compatible with all 10-, 11-, and 12-speed chains except Shimano 12-speed chains.
  • 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).
• Provide a great chainline on most boost bikes.
• Chainline – 50mm
• Weight: 30T – 44g, 32T – 55g, 34T – 60g, 36T – 70g, 38T – 83g

94 BCD – SRAM:

• These rings fit any SRAM crankset with a 94 BCD. 
• Note that we also offer SRAM Direct Mount chainrings for Standard and BB30 Short Spindle cranksets and some Stainless Steel versions.  
• For 1×9, 1×10, 1×11 and 1×12 drivetrains (including SRAM Eagle)
• Compatible with all 10-, 11-, and 12-speed chains except Shimano 12-speed chains.
• 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).
• Chainline – 49mm
• Provide a great chainline on most boost bikes. 
• Weight: 30T – 44g, 32T – 54g, 34T – 63g

96 BCD – Shimano Asymmetrical:

• These rings fit on the Shimano XT M8000, SLX M7000 or Deore M6000 1x or 2x cranksets 
• Not compatible with Deore triple (3x) cranksets!
• The 28T and 26T sizes will mount to the inner 64 BCD mounting position on these cranksets.
• For 1×9, 1×10, 1×11 and 1×12 drivetrains (including SRAM Eagle)
  • Compatible with all 10-, 11-, and 12-speed chains except Shimano 12-speed chains.
  • 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).
• Provide a great chainline on most Boost bikes.  See this explanation for details.
• Standard crank chainline – (48 mm for 26-28T), (49 mm for 30-34T) and (50 mm for 36-38T)
• Boost crankset chainline – (52 mm for 30-34T) and (53 mm for 36-38T)
• 10mm bolts are optimized for mounting this ring
• Weight: 26T – 42g, 28T – 50g, 30T – 41g, 32T – 50g, 34T – 59g, 36T – 69g

96 BCD – Shimano Symmetrical Compact Triple:

• These rings fit any 96 BCD Shimano Symmetric bolt pattern crankset.
• Compatible with the following Shimano crankset models: M782, M672, M622, M612
• Not compatible with XTR M9000 or XT M8000

• For 1×9, 1×10, 1×11 and 1×12 drivetrains (including SRAM Eagle)

  • Compatible with all 10-, 11-, and 12-speed chains except Shimano 12-speed chains.

  • 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)

• Chainline – 49mm.  Provides a great chainline on most boost bikes. 
• Weight: 30T – 41g, 32T – 50g, 34T – 59g

96 BCD – Shimano XTR 9000-9020:

• These rings fit on the Shimano XTR M9000 and M9020 1x or 2x cranksets
• Use only the stock Shimano XTR chainring bolts (M7)
• You will not use the stock bolt caps when mounting this ring.  The stock bolts will thread into the chainring’s standoffs from the outside of the crankset.

• For 1×9, 1×10, 1×11 and 1×12 drivetrains (including SRAM Eagle)

  • Compatible with all 10-, 11-, and 12-speed chains except Shimano 12-speed chains. 

  • Shimano 12 Speed specific option available. These are compatible with Shimano 12-speed Hyperglide+ chains.

  • 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).

• Chainline – 49 mm for 30-34T and 50 mm for 36T.  Provides a great chainline on most boost bikes.
• Weight: 30T – 41g, 32T – 50g, 34T – 59g, 36T – 69g