SRAM Braze-on Front Derailleur Clamp - 34.9mm with ChainSpotter Stop
What does the SRAM 34.9mm Braze-On clamp with ChainSpotter do?
The SRAM Braze-On Front Derailleur Clamp in 34.9mm with ChainSpotter Stop is an adapter that allows a braze-on front derailleur to be installed on frames with a round seat tube rather than a factory-welded braze-on tab. Without this clamp, braze-on derailleurs require a dedicated mounting tab welded to the frame — this clamp adds that interface by clamping around a 34.9mm seat tube and presenting the correct mounting surface for a braze-on derailleur body. It is the right solution for retrofitting older frames, building on non-braze-on tubes, or running a braze-on derailleur on any frame that was not built with the tab.
The integrated ChainSpotter Stop tab provides a mounting point for SRAM's ChainSpotter chain retention device alongside the derailleur, enabling lightweight chain control without additional hardware or a dedicated chainguide. ChainSpotter positions above the chainring to limit outward chain movement under rough conditions — appropriate for trail and light enduro where chain drops are occasional rather than constant. The 34.9mm diameter is the correct spec for most contemporary MTB seat tubes; verify your seat tube diameter before ordering since the 31.8mm version is also available. Installs with a standard 5mm hex wrench and is compatible with all SRAM braze-on front derailleurs across road and MTB platforms.
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SRAM Braze-on Front Derailleur Clamp - 34.9mm with ChainSpotter Stop
SRAM Braze-on Front Derailleur Clamp - 34.9mm with ChainSpotter Stop
What does the SRAM 34.9mm Braze-On clamp with ChainSpotter do?
The SRAM Braze-On Front Derailleur Clamp in 34.9mm with ChainSpotter Stop is an adapter that allows a braze-on front derailleur to be installed on frames with a round seat tube rather than a factory-welded braze-on tab. Without this clamp, braze-on derailleurs require a dedicated mounting tab welded to the frame — this clamp adds that interface by clamping around a 34.9mm seat tube and presenting the correct mounting surface for a braze-on derailleur body. It is the right solution for retrofitting older frames, building on non-braze-on tubes, or running a braze-on derailleur on any frame that was not built with the tab.
The integrated ChainSpotter Stop tab provides a mounting point for SRAM's ChainSpotter chain retention device alongside the derailleur, enabling lightweight chain control without additional hardware or a dedicated chainguide. ChainSpotter positions above the chainring to limit outward chain movement under rough conditions — appropriate for trail and light enduro where chain drops are occasional rather than constant. The 34.9mm diameter is the correct spec for most contemporary MTB seat tubes; verify your seat tube diameter before ordering since the 31.8mm version is also available. Installs with a standard 5mm hex wrench and is compatible with all SRAM braze-on front derailleurs across road and MTB platforms.
Product Information
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Shipping & Returns
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Description
What does the SRAM 34.9mm Braze-On clamp with ChainSpotter do?
The SRAM Braze-On Front Derailleur Clamp in 34.9mm with ChainSpotter Stop is an adapter that allows a braze-on front derailleur to be installed on frames with a round seat tube rather than a factory-welded braze-on tab. Without this clamp, braze-on derailleurs require a dedicated mounting tab welded to the frame — this clamp adds that interface by clamping around a 34.9mm seat tube and presenting the correct mounting surface for a braze-on derailleur body. It is the right solution for retrofitting older frames, building on non-braze-on tubes, or running a braze-on derailleur on any frame that was not built with the tab.
The integrated ChainSpotter Stop tab provides a mounting point for SRAM's ChainSpotter chain retention device alongside the derailleur, enabling lightweight chain control without additional hardware or a dedicated chainguide. ChainSpotter positions above the chainring to limit outward chain movement under rough conditions — appropriate for trail and light enduro where chain drops are occasional rather than constant. The 34.9mm diameter is the correct spec for most contemporary MTB seat tubes; verify your seat tube diameter before ordering since the 31.8mm version is also available. Installs with a standard 5mm hex wrench and is compatible with all SRAM braze-on front derailleurs across road and MTB platforms.
