Tools for Removing Ofmega Mistral BB
07-14-15 | 06:32 AM
#1
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Tools for Removing Ofmega Mistral BB
I need to remove an Ofmega Mistral BB from one of my bikes. It's one of these:
Velobase says I need a "Spanner, Locknut Wrench and Fixed Cup Wrench", but I'm somewhat new to this and don't know exactly what size wrenches I need.
VeloBase.com - Component: Ofmega Mistral
Does anyone know exactly what tools I need to order for this job?
Velobase says I need a "Spanner, Locknut Wrench and Fixed Cup Wrench", but I'm somewhat new to this and don't know exactly what size wrenches I need.
VeloBase.com - Component: Ofmega Mistral
Does anyone know exactly what tools I need to order for this job?
07-14-15 | 06:40 AM
#2
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From: New York, NY
Bikes: Black Mountain Cycles Road and canti MX, Cannondale CAAD12, Bob Jackson Vigorelli
Well, most bottom brackets are pretty standard.
I would use this to get off the locknut: Park Tool Co. » HCW-5 : Crank and Bottom Bracket Wrench : Crank Tools
I would use this to take off the cups: Park Tool Co. » HCW-4 : Crank and Bottom Bracket Wrench : Crank Tools
Remember that the fixed cup is reverse threaded.
Every now and then, the fixed cup is stuck. Then, you need to make a Sheldon tool.
I would use this to get off the locknut: Park Tool Co. » HCW-5 : Crank and Bottom Bracket Wrench : Crank Tools
I would use this to take off the cups: Park Tool Co. » HCW-4 : Crank and Bottom Bracket Wrench : Crank Tools
Remember that the fixed cup is reverse threaded.
Every now and then, the fixed cup is stuck. Then, you need to make a Sheldon tool.
07-14-15 | 06:46 AM
#3
Thrifty Bill
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From: Mans of NC & SW UT Desert
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
Lock ring wrench, pin spanner, and fixed cup tool. I like the Sugino tool set, long out of production, but it came with everything you need. Unfortunately, the Sugino set has gotten expensive lately. Hozan lock ring wrench is superb, but if this is a one time job, even an adjustable wrench will work.
Park sells a fixed cup wrench with a pin spanner on one end. Any bike shop will have one. (HCW-4).
The question on the cost of tools is how often do you plan to use them? If you are going to routinely do this kind of work, then getting good tools is a worthwhile investment. If it is a one time job, then head to the nearest co-op and use their tools. I love tools, so any reason/excuse to get some nice ones is reason enough for me.
Park sells a fixed cup wrench with a pin spanner on one end. Any bike shop will have one. (HCW-4).
The question on the cost of tools is how often do you plan to use them? If you are going to routinely do this kind of work, then getting good tools is a worthwhile investment. If it is a one time job, then head to the nearest co-op and use their tools. I love tools, so any reason/excuse to get some nice ones is reason enough for me.
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Please don't confuse ebay "asking" prices with "selling" prices. Many sellers never get their ask price. some are far from it. Value is determined once an item actually SELLS. Its easy enough to check SOLD prices.
07-14-15 | 06:51 AM
#4
multimodal commuter
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From: NJ, NYC, LI
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
The fixed cup thread is reversed if it's English thread (1.375" X 24 tpi) (which is likely) or Swiss thread (35 mm X 1mm)(very unlikely).
The fixed cup is not reversed if it's Italian thread (36 mm X 24 tp)(which is most likely) or French thread (35 mm X 1mm) (less likely)
The fixed cup is not reversed if it's Italian thread (36 mm X 24 tp)(which is most likely) or French thread (35 mm X 1mm) (less likely)
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07-14-15 | 06:51 AM
#5
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The question on the cost of tools is how often do you plan to use them? If you are going to routinely do this kind of work, then getting good tools is a worthwhile investment. If it is a one time job, then head to the nearest co-op and use their tools. I love tools, so any reason/excuse to get some nice ones is reason enough for me.
07-14-15 | 10:28 AM
#6
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From: Aurora, IL
Bikes: '73 Raleigh RRA, 1986 Trek 500 commuter
Heed rhm in post #4 as to thread direction for the fixed cup. Likely English thread, which uses left hand thread, but Italian or French could be somewhat likely as well...
07-14-15 | 11:47 AM
#7
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Bikes: 1986 Alan Record Carbonio, 1985 Vitus Plus Carbone 7, 1984 Peugeot PSV, 1972 Line Seeker, 1986(est.) Medici Aerodynamic (Project), 1985(est.) Peugeot PY10FC
Best fixed cup removal tool would be an big bench vice with good, flat, straight jaw edges, Put the frame/BB right over the vise, tighten it against the fixed cup flats and turn the frame as needed to break free the fixed cup, while putting downward pressure over the BB. No fixed cup ever defeated me when I did this, even the real tight ones.....
07-14-15 | 12:19 PM
#8
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Thanks. It's Italian threaded - De Rosa.
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