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#1
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MTB front wheel bearings.
Am I right to assume the front bearings also have 9 balls per race like the
back wheel - just smaller balls? Great care was taken to poke the balls out of the hub onto an old T-shirt, I ended up with 18 of them - losing an even number would be too much coincidence! Thanks. |
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#2
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MTB front wheel bearings.
On 18/11/2014 5:11 AM, Ian Field wrote:
Am I right to assume the front bearings also have 9 balls per race like the back wheel - just smaller balls? Great care was taken to poke the balls out of the hub onto an old T-shirt, I ended up with 18 of them - losing an even number would be too much coincidence! Thanks. Every cup and cone front hub I have ever serviced has had ten 3/16" balls per side. Rear hubs, nine 1/4" balls. If there are circular steel retainers holding the balls in their little claws there can be as few as seven per side but for crowded balls in a front hub, ten per side. Retainers are for convenience of assembly at the hub factory. Perhaps someone has been there before you, lost one and left out another one to redress the balance. PH |
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MTB front wheel bearings.
On Monday, November 17, 2014 12:37:07 PM UTC-8, Peter Howard wrote:
On 18/11/2014 5:11 AM, Ian Field wrote: Am I right to assume the front bearings also have 9 balls per race like the back wheel - just smaller balls? Great care was taken to poke the balls out of the hub onto an old T-shirt, I ended up with 18 of them - losing an even number would be too much coincidence! Thanks. Every cup and cone front hub I have ever serviced has had ten 3/16" balls per side. Rear hubs, nine 1/4" balls. If there are circular steel retainers holding the balls in their little claws there can be as few as seven per side but for crowded balls in a front hub, ten per side. Retainers are for convenience of assembly at the hub factory. Perhaps someone has been there before you, lost one and left out another one to redress the balance. PH e.g. http://www.damourbicycles.com/images...ts/2218124.jpg -- Jay Beattie. |
#4
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MTB front wheel bearings.
"jbeattie" wrote in message ... On Monday, November 17, 2014 12:37:07 PM UTC-8, Peter Howard wrote: On 18/11/2014 5:11 AM, Ian Field wrote: Am I right to assume the front bearings also have 9 balls per race like the back wheel - just smaller balls? Great care was taken to poke the balls out of the hub onto an old T-shirt, I ended up with 18 of them - losing an even number would be too much coincidence! Thanks. Every cup and cone front hub I have ever serviced has had ten 3/16" balls per side. Rear hubs, nine 1/4" balls. If there are circular steel retainers holding the balls in their little claws there can be as few as seven per side but for crowded balls in a front hub, ten per side. Retainers are for convenience of assembly at the hub factory. Perhaps someone has been there before you, lost one and left out another one to redress the balance. PH e.g. http://www.damourbicycles.com/images...ts/2218124.jpg -- Jay Beattie. Thanks - I've got a few front wheels with warped rims, so no need to buy more bearing balls just yet. |
#5
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MTB front wheel bearings.
On 11/17/2014 1:11 PM, Ian Field wrote:
Am I right to assume the front bearings also have 9 balls per race like the back wheel - just smaller balls? Great care was taken to poke the balls out of the hub onto an old T-shirt, I ended up with 18 of them - losing an even number would be too much coincidence! Thanks. The most common fronts have 10x10 of 3/16" balls. Some 'mtb' models have 9x9 of 1/4" -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#6
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MTB front wheel bearings.
"AMuzi" wrote in message ... On 11/17/2014 1:11 PM, Ian Field wrote: Am I right to assume the front bearings also have 9 balls per race like the back wheel - just smaller balls? Great care was taken to poke the balls out of the hub onto an old T-shirt, I ended up with 18 of them - losing an even number would be too much coincidence! Thanks. The most common fronts have 10x10 of 3/16" balls. Some 'mtb' models have 9x9 of 1/4" Well they're not 1/4" - so looks like 10 each side. BTW: is there a standard size for the cone flats on the front? The bicycle tool kit I have includes a pressed steel flat spanner for the back cones (that actually fit once I'd ground the burrs off). No sign of anything in there to fit front cone flats - looks like either rummage all the other toolboxes for a flat spanner that just happens to fit, or grind down a regular spanner. Spanner = wrench. |
#7
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MTB front wheel bearings.
On 11/17/2014 3:39 PM, Ian Field wrote:
"AMuzi" wrote in message ... On 11/17/2014 1:11 PM, Ian Field wrote: Am I right to assume the front bearings also have 9 balls per race like the back wheel - just smaller balls? Great care was taken to poke the balls out of the hub onto an old T-shirt, I ended up with 18 of them - losing an even number would be too much coincidence! Thanks. The most common fronts have 10x10 of 3/16" balls. Some 'mtb' models have 9x9 of 1/4" Well they're not 1/4" - so looks like 10 each side. BTW: is there a standard size for the cone flats on the front? The bicycle tool kit I have includes a pressed steel flat spanner for the back cones (that actually fit once I'd ground the burrs off). No sign of anything in there to fit front cone flats - looks like either rummage all the other toolboxes for a flat spanner that just happens to fit, or grind down a regular spanner. Spanner = wrench. Most fronts are 13mm flats. As with everything, some are not. Notably, some current low-end cones[1] are famously somewhere between 13mm and 14mm. It's annoying in front but a real pain on the just bigger than 15mm but not 16mm rears. [1] the ones with four flats. Yes, two chances to be off spec and they fail twice. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#8
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MTB front wheel bearings.
On 11/17/2014 4:53 PM, AMuzi wrote:
Most fronts are 13mm flats. As with everything, some are not. Notably, some current low-end cones[1] are famously somewhere between 13mm and 14mm. It's annoying in front but a real pain on the just bigger than 15mm but not 16mm rears. [1] the ones with four flats. Yes, two chances to be off spec and they fail twice. ! That's exactly was what was on that Toys-R-Us bike I fixed the other week! What the hell? Is China instituting another measurement system?? -- - Frank Krygowski |
#9
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MTB front wheel bearings.
On 11/17/2014 4:37 PM, Frank Krygowski wrote:
On 11/17/2014 4:53 PM, AMuzi wrote: Most fronts are 13mm flats. As with everything, some are not. Notably, some current low-end cones[1] are famously somewhere between 13mm and 14mm. It's annoying in front but a real pain on the just bigger than 15mm but not 16mm rears. [1] the ones with four flats. Yes, two chances to be off spec and they fail twice. ! That's exactly was what was on that Toys-R-Us bike I fixed the other week! What the hell? Is China instituting another measurement system?? Measurement? You're not cynical enough. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#10
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MTB front wheel bearings.
On Tue, 18 Nov 2014 06:36:59 +1000, Peter Howard
wrote: On 18/11/2014 5:11 AM, Ian Field wrote: Am I right to assume the front bearings also have 9 balls per race like the back wheel - just smaller balls? Great care was taken to poke the balls out of the hub onto an old T-shirt, I ended up with 18 of them - losing an even number would be too much coincidence! Thanks. Every cup and cone front hub I have ever serviced has had ten 3/16" balls per side. Rear hubs, nine 1/4" balls. If there are circular steel retainers holding the balls in their little claws there can be as few as seven per side but for crowded balls in a front hub, ten per side. Retainers are for convenience of assembly at the hub factory. Perhaps someone has been there before you, lost one and left out another one to redress the balance. PH The old rule of thumb was that you installed one less balls than would fit into the race. In other words if you could jam, say 11 balls into a clean dry race you actually installed 10. The idea being that the balls rode between the inner and outer race and not rubbing against each other. As someone else relates, if there is a retainer then fewer balls are used. -- cheers, John D.Slocomb |
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