The Box Two Hollow Center Clamp stem is cold forged from the highest quality 6061-T6 aluminum available. Featuring an open skeletal design & a dual mid-bolt wedge mounting system, they are lightweight yet maintain a very high level of strength. A 53mm extension stem weighs just 218g/7.7oz. By removing the rear pinch bolts & moving the mounting bolts to the middle of the stem, Box reduced the weight & E3size & eliminated a serious hazard to the rider’s knees. These stems come with either a 48mm or 53mm extension & have a 22.2mm clamping diameter. To ensure proper clamping force, the stem must be mounted on a fork with at least 45mm of exposed steerer tube. Not compatible with forks that have carbon fiber steerer tubes. section Product Specs TYPE: Front Load REACH: 40mm/45mm/48mm/53mm RISE: 5mm CLAMPING DIAMETER: 22.2mm WEIGHT: 218g/7.7oz (53mm) E4 ...

The Box Two Hollow Center Clamp stem is cold forged from the highest quality 6061-T6 aluminum available. Featuring an open skeletal design & a dual mid-bolt wedge mounting system, they are lightweight yet maintain a very high level of strength. A 53mm extension stem weighs just 218g/7.7oz. By removing the rear pinch bolts & moving the mounting bolts to the middle of the stem, Box reduced the weight & E3size & eliminated a serious hazard to the rider’s knees. These stems come with either a 48mm or 53mm extension & have a 22.2mm clamping diameter. To ensure proper clamping force, the stem must be mounted on a fork with at least 45mm of exposed steerer tube. Not compatible with forks that have carbon fiber steerer tubes. section Product Specs TYPE: Front Load REACH: 40mm/45mm/48mm/53mm RISE: 5mm CLAMPING DIAMETER: 22.2mm WEIGHT: 218g/7.7oz (53mm) E4 ...

The Box Two Hollow Center Clamp stem is cold forged from the highest quality 6061-T6 aluminum available. Featuring an open skeletal design & a dual mid-bolt wedge mounting system, they are lightweight yet maintain a very high level of strength. A 53mm extension stem weighs just 218g/7.7oz. By removing the rear pinch bolts & moving the mounting bolts to the middle of the stem, Box reduced the weight & E3size & eliminated a serious hazard to the rider’s knees. These stems come with either a 48mm or 53mm extension & have a 22.2mm clamping diameter. To ensure proper clamping force, the stem must be mounted on a fork with at least 45mm of exposed steerer tube. Not compatible with forks that have carbon fiber steerer tubes. section Product Specs TYPE: Front Load REACH: 40mm/45mm/48mm/53mm RISE: 5mm CLAMPING DIAMETER: 22.2mm WEIGHT: 218g/7.7oz (53mm) E4 ...

The Box Two Hollow Center Clamp stem is cold forged from the highest quality 6061-T6 aluminum available. Featuring an open skeletal design & a dual mid-bolt wedge mounting system, they are lightweight yet maintain a very high level of strength. A 53mm extension stem weighs just 218g/7.7oz. By removing the rear pinch bolts & moving the mounting bolts to the middle of the stem, Box reduced the weight & E3size & eliminated a serious hazard to the rider’s knees. These stems come with either a 48mm or 53mm extension & have a 22.2mm clamping diameter. To ensure proper clamping force, the stem must be mounted on a fork with at least 45mm of exposed steerer tube. Not compatible with forks that have carbon fiber steerer tubes. section Product Specs TYPE: Front Load REACH: 40mm/45mm/48mm/53mm RISE: 5mm CLAMPING DIAMETER: 22.2mm WEIGHT: 218g/7.7oz (53mm) E4 ...

The Box Two Hollow Center Clamp stem is cold forged from the highest quality 6061-T6 aluminum available. Featuring an open skeletal design & a dual mid-bolt wedge mounting system, they are lightweight yet maintain a very high level of strength. A 53mm extension stem weighs just 218g (7.7oz). By removing the rear pinch bolts & moving the mounting bolts to the middle of the stem, Box reduced the weight, size & eliminated a serious hazard to the rider's knees. These stems come with either a 48mm or 53mm extension & have a 22.2mm clamping diameter. To ensure proper clamping force, the stem must be mounted on a fork with at least 45mm of exposed steerer tube. Not compatible with forks that have carbon fiber steerer tubes. section Product Specs TYPE:  Front Load REACH: 40
- 53mm RISE: 5mm CLAMPING DIAMETER: 22.2mm WEIGHT: 213g (7.52oz)
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The Box Two External bottom brackets feature cold-forged & CNC-machined alloy cups, dual-labyrinth bearing covers & precision sealed bearings. They are the perfect upgrade to the budget BBs sold with most cranksets. Box Two External Bottom Brackets are designed to fit all 24-millimeter crank spindles & frames with 68 or 73 x BC 1.37-inch bottom bracket shells. ...

The Box Two External bottom brackets feature cold-forged & CNC-machined alloy cups, dual-labyrinth bearing covers & precision sealed bearings. They are the perfect upgrade to the budget BBs sold with most cranksets. Box Two External Bottom Brackets are designed to fit all 24-millimeter crank spindles & frames with 68 or 73 x BC 1.37-inch bottom bracket shells. ...

The Box Two External bottom brackets feature cold-forged & CNC-machined alloy cups, dual-labyrinth bearing covers & precision sealed bearings. They are the perfect upgrade to the budget BBs sold with most cranksets. Box Two External Bottom Brackets are designed to fit all 24-millimeter crank spindles & frames with 68 or 73 x BC 1.37-inch bottom bracket shells. ...

The Box Two External bottom brackets feature cold-forged & CNC-machined alloy cups, dual-labyrinth bearing covers & precision sealed bearings. They are the perfect upgrade to the budget BBs sold with most cranksets. Box Two External Bottom Brackets are designed to fit all 24-millimeter crank spindles & frames with 68 or 73 x BC 1.37-inch bottom bracket shells. ...

The Box Two External bottom brackets feature cold-forged & CNC-machined alloy cups, dual-labyrinth bearing covers & precision sealed bearings. They are the perfect upgrade to the budget BBs sold with most cranksets. Box Two External Bottom Brackets are designed to fit all 24-millimeter crank spindles & frames with 68 or 73 x BC 1.37-inch bottom bracket shells. ...