









Round Boost for Shimano DM 12sp. MTB
Shipping and processing
Processing time: up to 10 business days. Shipping time: 2 to 7 business days. Provided by FedEx
Return policy
You can return an unused product within 30 days











Technical specifications
| MTB bikes | |
| 26T-38T 3,0mm; 40T-44T 2,0mm | |
| 26T- 115mm; 28T- 124mm; 30T- 131,5mm; 32T- 138,6mm; 34T- 148mm; 36T- 154,2mm; 38T- 161,3mm; 40T- 171,0mm; 42T- 179,0mm; 44T- 187,0mm | |
| 26T-38T 52,0mm; 55,0mm; 56,5mm (depending on used crank) | |
| 26T- 44g; 28T- 48g; 30T- 55g; 32T- 60g; 34T- 66g; 36T- 70g; 38T- 75g; 40T- 83g; 42T- 86g; 44T- 91g | |
| Aluminum 7075-T6 | |
| CNC milling | |
| Anodizing |
Compatibility
MTB chainrings you may use the following chains: all 10sp; 11sp; 12sp Shimano Hyperglide+ and 10sp, 11sp, 12sp SRAM. (Not compatible with SRAM Flattop chains) |
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For Shimano Direct Mount 12 speed cranksets: XTR M9100/9120/9125/9130, XT M8100/8120/8130, SLX M7100/7120/7130, Deore M6100/6120/6130, MT900, MT610; Cranksets M9100 /9120 , M8100, M7100, M6100, MT900, MT610 will use with a Boost chainring (3mm offset), and it is compatible with 142 mm or 148 mm O.L.D. frames; Cranksets M9125, M8120, M7120, M6120 have a longer spindle and also use a Boost chainring (3mm offset). It is compatible with 148 mm O.L.D. frames; Cranksets M9130, M8130, M7130, M6130 have an even longer spindle and also use a Boost chainring (3mm offset). These cranks should use with 157 mm O.L.D. frames |
Recommendations
- We recommend the use of a clutch system rear derailleur for the best chain security.
- It is also a good idea to use a new chain with your new ALUGEAR chainring.
Installation Instructions
| Round Alugear chainring installation | Download |
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Engineering excellence












