Boardman SLR 8.9 Bottom Bracket: Three Catalogue Descriptions to Check
“Boardman SLR 8.9 bottom bracket” is not one unchanging part description. The name appears on catalogue entries with different cranksets and bottom-bracket labels. A useful replacement search therefore starts with the exact bicycle, not with the assumption that all SLR 8.9 frames share a shell and bearing arrangement.
Boardman SLR 8.9 bottom bracket catalogue entries
| Official catalogue entry | Published bottom-bracket description |
|---|---|
| 2341, SLR 8.9 rim-brake configuration | FSA BB-CF86/CZ Pressfit for MegaExo Chainset |
| 2369, SLR 8.9 Disc configuration | Shimano Press Fit |
| 2422, SLR 8.9 Carbon configuration | BB386EVO |
These are descriptions transcribed from separate manufacturer specifications. The table does not say that the three assemblies interchange. In particular, the middle entry is broad wording, not a full set of shell and crank dimensions.
For context on the road family within the wider business, the Boardman overview is useful. For a bottom-bracket order, the individual frame and crank identification must go further than that overview.
Read the crankset line as well
A bottom bracket connects two sides of a compatibility question: the frame and the crank spindle. Knowing only one side can leave the replacement unresolved. Copy the crankset description from the same catalogue entry, then compare it with the components actually fitted to the bicycle.
If the crankset has been replaced, make that change explicit to the mechanic or parts supplier. A previous owner’s component choice can explain why a catalogue search and a visible marking appear to disagree. It should prompt an inspection, not an improvised assumption that the frame has a different standard.
Keep observations separate from conclusions. A part number printed on an accessible component is useful evidence. A generic noise while pedalling does not, by itself, identify a failed bottom bracket or tell you which replacement is required. Describe the symptom and when it occurs so a workshop can investigate it.
Turn the comparison into an exact order
Send the frame model and identification, the relevant catalogue page, the installed crankset marking and any known service history together. Ask the supplier to confirm the complete replacement reference and its suitability for both frame and crank. Where the page supplies only a family description, leave measurements and installation requirements open until they have been verified.
Do not select a press tool, removal method or tightening value from this table. Those decisions depend on the actual assembly. The Boardman reference topic groups the related guides, while model-specific manufacturer information and a competent inspection settle the mechanical details.
A small note kept after the service can save repeating the process: record what frame was inspected, what crank was fitted and which complete bottom bracket was installed. This is a record of the actual bicycle, rather than a claim about every SLR carrying the same number.
FAQ
Is every SLR 8.9 a BB386EVO bike?
No. That wording appears on entry 2422, while other inspected SLR 8.9 entries use different descriptions. Identify the particular frame and configuration.
Does “Shimano Press Fit” provide every measurement I need?
No. The wording alone does not settle all shell, spindle and replacement-kit details. Request the exact supported part reference for the bicycle.
Can I use the original catalogue after a crank upgrade?
It remains useful for the original specification, but the new crank must also be identified. Have both sides of the frame-and-crank combination checked before ordering.
Primary references: manufacturer reference 1 (https://www.boardmanbikes.com/gb_en/products/2341-slr-8.9-2021.html); manufacturer reference 2 (https://www.boardmanbikes.com/gb_en/products/2369-slr-8.9-carbon-disc-2021.html); manufacturer reference 3 (https://www.boardmanbikes.com/gb_en/products/2422-slr-8.9-carbon.html).
Photograph credits and permissions
Photograph 1
Original title: My Boardman Bike
Creator: Peter C; creator URI: https://www.flickr.com/photos/pmcowley
Original source URI: https://www.flickr.com/photos/pmcowley/3306171226/
License / permission: CC BY 2.0
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