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Special bottom bracket needed for older Merlin?(4 posts)

Special bottom bracket needed for older Merlin?bigskulls
Dec 16, 2003 3:11 PM
I have an older Merlin (1992, I think....), and I'm wondering if anyone can enlighten me on the need for a specially sized bottom bracket or spindle? I'm looking to convert a double to a triple, so obviously I need a new BB, but when I got the BB replaced after I bought the bike, the LBS told me its a special size that has to be special ordered....
It's a Phil Wood BBrussw19
Dec 16, 2003 3:55 PM
You can email Phil Wood and ask them. I doubt that Merlin would be any help as this bike is pre Litespeed ownership.


Grease Guard BBBixe
Dec 16, 2003 5:00 PM
The '91 Merlin came with the WTB Grease Guard BB. They use a pair of Phil Wood precision 6903 bearings (17mm ID) with a 113mm spindle. Phil Wood lists spindles in longer lengths with JIS tapers in both steel and titanium. The bottom bracket assembly is anything but conventional in the realm of bottom brackets, so finding an experienced mechanic might be tough. The bearing replacement requires pressing the bearings out and back in. I still have a copy of the procedure in the archives, though I have no idea whether the tooling is available. Frankly, I was rather happy to see that configuration disappear....
re: Special bottom bracket needed for older Merlin?jimPz
Dec 16, 2003 5:01 PM
depending on the length of the BB you may not need to replace it. Many of the BB's in the early 90's were in the 111 to 113 mm range. This is the length that many of the new triples use. Old Campy doubles were 111 as are the new Campy Triples. many Shimano doubles were 113. You may find triples that use this length.