15. How to Overhaul Wheel Bearings
Overhaul a hub, replace and grease the wheel bearings, and adjust the cones.
This tutorial will demonstrate how to grease your wheel bearings. For this job you’ll need some rags, waterproof grease, and a 17mm open-end wrench. You’ll also need a 13mm cone wrench for a front hub, and a 15mm cone wrench for a rear hub. When overhauling a hub, you should always replace the ball bearings. Most front hubs need 10 3/16″ bearings per side, while rear hubs usually need 9 1/4″ bearings.
Place the wheel on its side and slide a cone wrench onto the cone flats, and then loosen the left, or non-drive side locknut by turning it counter-clockwise against the cone wrench. Completely un-thread and remove the cone and locknut, and then slide the axle out from the right side of the hub.
Clean all of the old grease off of the axle and cones and remove all of the bearings from both sides, making sure to count how many you take out. Then clean the inside of the hub and carefully inspect both the cones and the inner bearing races. If there is any damage such as pitting then the cone and/or hub should be replaced.
Apply a generous layer of grease to both of the hub’s bearing races. Then carefully insert all of the new bearings by pushing them down in the grease. When all of the bearings are installed, there should be about half a bearing space left. Cover all of the bearings with a layer of grease and lightly grease the axle threads.
Once the bearings are installed on both sides, carefully slide the axle into hub, making sure the bearings stay in place. Thread the left side cone, washer (if any) and locknut all the way on finger tight.
Now lay the wheel back on its side and place the cone wrench on the cone. Tighten the locknut against the cone and check to make sure there is no play in the hub, and that the wheel spins freely. You may have to loosen the locknut and repeat the procedure many times before it is correct. Quick release mechanisms tighten the cones slightly, so if you have a quick release axle, you’ll have to leave a slight bit of play in the hub.
Re-install any seals and then put the wheel back on your bike. Finally, check the adjustment again by moving the wheel side to side at the rim. Again, there shouldn’t be play in the wheel, and it should spin smoothly.
I've been having a terrible time trying to remove a very old Regina America Freewheel. I purchased a Park FR4 remover from a local bike shop. However, the tool would not fit over the ridged round "nut" on the outside of the wheel. A tech at the shop indicated that I should try to "tap" the "nut" in to access the freewheel locking nut. I gave it quite a few "taps" (actually, hard raps) with no success. I tried using a vise to press on it, also with no success. I'm trying to replace a broken spoke on the freewheel side of the wheel and have been off the bike for 2 weeks... Read more >>
Hello all, new to bikes and the forum and needed some simple help. I can't seem to find on the internet what size rim i would need. I have 2 of these bikes.. 1 of which had both wheels stolen.. and the other i had an accident that cause 4 of the spokes to bust out and the wheel slightly bent.. so now i am out of 2 bikes!!!
anywho here is the information to the model i currently have
22.5" GMC Denali 700c Men's Road Bike, Black/Orange:
Shimano FD-TZ 31 Index front derailleur
Shimano RD-TZ30GS 7SPD rear derailleur
Promax 501A alloy caliper brak... Read more >>
I've got an older set of 700 wheels that should be replaced with a set I picked up recently. The problem is that the newer set has a 135mm rear dropout spacing axle and the old set is 126mm, which fits my older road bike frame. The newer set has a 9 speed cassette and the older is a 7 speed cassette.
Can I change the axle in the newer set to fit my older frame and will the older 7 speed cassette work fine or do I need to change the cassette freewheel??... or if there is a better way... ?
Thanks !... Read more >>
Hi there, I just wanted to know if you all use a spoke tensioning meter (park tool TM-1) when tensioning your spokes, or if there was another way of doing it without one as they are quite pricey for a bit of plastic! I wondered whether you just guess within reason or go by feel? thanks... Read more >>
I've just noticed my front wheel is not centred within my front fork and is off to the left, which is causing the right v-brake caliper to lean over towards the left also. How can I fix this? I've tried taking it off and rebolting it back in, but it just goes back to the same position. Thanks for any help!... Read more >>
I have had built a custom rear rim which uses a Novatec D042 hub. I received the rim back via courier yesterday, fitted the tube and tyre on and mounted it back on the frame (a Specialized Cross Trail Sport Disc hybrid).
When I turn the pedals with the bike on the maintenance stand and then stop turning, simulating freewheeling down a hill for example, the hub doesnt freewheel, it keeps turning the pedals like it was a fixed gear bike.
I know the obvious answer is to go back to the guy who built the rim (and who also put the disc brake and cogs back on the new rim for me) but he is... Read more >>
I have an old road bike with very narrow tires. I plan to use this as a commuter bike, so I'd like to swap out to thicker tires, something like the Schwalbe Marathons. The wheel size currently is 700c.
The issue that I have is that the fork crown is very close to the current narrow tire. I've attached a picture. The only option I can think of is that I need to get a slightly smaller wheel and also possibly new brakes with long-reach.
I wondered if anybody has suggestions or other ideas.
[attachment=5282]... Read more >>
I have a 1998 GT Palomar and I put new wheels on it about 3 years ago and it was serviced just a couple of weeks ago. Anyway, after the service the back wheel has been spinning freely. However, I picked up a puncture and removed the wheel and sorted the puncture, but when I put the wheel back on and tighten the nuts the wheel only spins for about 1/10th as long as it was just before. I am completely stumped, could anyone help?
Ben... Read more >>
I just mated a 7 speed wheel with my old 10 speed and have noticed that the freewheel is wobbling in driven mode only...not so much when coasting. Ideas?
Video here: http://youtu.be/eD-GCu0GHd4... Read more >>
I broke two spokes and resolved to fix them myself.
I removed the cassette on the wheel, removed the broken spokes, thread the new spokes through the hub and the other spokes, but I cannot get the new spokes to screw into the old nipples. Or, rather, I can get them started, but there is a point past which my spoke wrench will not turn.
I am starting to think that I need to replace the old nipple with the new nipple that came with the new spoke.
Now that I type it out it seems obvious, but is this right? New spokes will not always go into old nipple?
Read more >>
Hello, I just would like to know if it's possible to put 26' hybrid wheels onto a mountain bike frame? and also if you take a look at the picture of this bike frame, whether or not the back end would be compatible with quick release as it's an old frame. The front should be as I've brought new forks for it, thanks. Daniel... Read more >>
this is a complete noob question i know, but please bear with me!
My front wheel had a bit of play so i did a bit of reading, took it off and tightened the cone nuts. Once i did this the hub turned freely and there was pretty much the same amount of axle showing at each side. the thing is, there is only enough axle to go about half way through the drop out. the way i see it, the axle cannot go all the way to the outside of the drop out, otherwise there will be no room for the springs to compress on the quick release skewer, but only about half the thickness of the drop out... Read more >>
I don't know if I am doing this procedure whole wrong, but when I try to tighten my back tire, the nuts just keep spinning and not tightening. I made sure to hold the opposite still screw it in, but the nuts just spin rather than tighten. Is it something wrong with my bike or are the nuts faulty?... Read more >>
During cleaning on my bike, I've discovered that this guard has been damaged.
Do you really need this? Or would it be fine without it?... Read more >>
Hey Please to meet you I'm a new user.
I've recently built a set of road wheels
Stan's alpha 340 rims with 253g set of hubs, sapim spokes and nipples (20/24) weighing about 1200g all in with tyres.
I've ridden them twice and both times i've took out a different spoke from the rear drive side of the wheel, its pulled the spoke out of the nipple, thread gone (I believe brass nipples not sure til tomz if they are alloy til I ask my wheel builder guy).
Cant understand why?
I'm now starting to think my weight is the reason I'm 85kg.<... Read more >>