Two Quck Quesitons

sanins192

The lockring on my Shimano sprocket cassette has two small holes on it. I think I can recall removing this by pushing on the two holes and then unscrewing, although this seems very hard. Am I doing this correctly?

I am changing the hub on my wheel, although I have never rebuilt a wheel before. If I put in the spokes and then get Halfords / bike shop to tension and true the wheel, how much should I be expecting to pay? How much more would it be for them to rebuild the wheel frmo scratch?

Thanks!

nicklouse

Err you will need new spokes in 99% of the time. Unless the hub is exactly the same make model and year.

have a read of this http://www.parktool.com/repair/readhowto.asp?id=48 for removing the block.

redvee

Only freewheels have the holes you describe, not cassettes. You riding a 7 speed bike?
With the wheel, if you go as far as swapping the spokes over yourself, you may as well have a go at finishing the wheel. When putting the spokes in make sure you put them in the right holes on the right side of the rim. If you totally balls it up then go with shame to hlafords or go with some respect to LBS and give them 10 beer tokens.

stu8975

what cassette is it?...you will most likely require new spokes with your new hub (different flange diameters etc) and therefore cost of new spokes + build cost..might be cheaper to buy a new wheel...what hub/rim are you using?

sanins192

Thanks Redvee. How do I remove the freewheel then? The part with the two notches?

nicklouse

have a read of the park tools link i gave above and identify the block and see if there is some splines then get the correct tool.

stu8975

if you have a 'screw on' type freewheel (ie..it all comes off in one piece), it wont fit a 'cassette' type hub..

nicklouse

as said in your other post get a new wheel as you WILL need new spokes going from a spin on to a cassette.

will your frame take the wider hub?

sanins192

It is hard to decribe what it looks like. I can see straight through the hub, but the only thing keeping the sprockets on is a ring with two small nothces on it. It is a one year old bike so I am guessinig the components are new. How do I remove the sprockets b removing the ring with the two notches?

stu8975

Does it look like any of them?
What bike is it?

sanins192

It looks like the top one, but without the nut in the middle. All there is is the disc with two notches in it. It looks like all of those, except it looks most like the top one. Do I remove the disc with pair of pliers in the two holes and twisiting?

nicklouse

no there should be some internal splines.

But before you go there do you really need to.

it will be cheaper to buy a ready built wheel rather than to have one built up with your old rim, new spokes and new hub.

stu8975

what bike is it? should be able to find what components are fitted and advise accordingly....but if it is the top one and you want to fit it to the new hub..it wont fit..you will have to buy a 'cassette' type for the new hub or buy a suitable wheel to refit the current one to (but you will be limited to screw on type hubs).

check here to see if any of the others are a better match..
http://www.parktool.com/repair/readhowto.asp?id=48

or take a pic and post it so we can have a look

sanins192

OK, I have uploaded some photos: It is a seven speed Land Rover G4 Challeng bike (hard tail version):

http://i183.photobucket.com/albums/x93/ ... G_3561.jpg
http://i183.photobucket.com/albums/x93/ ... G_3560.jpg
http://i183.photobucket.com/albums/x93/ ... ike001.jpg

What I want to do:
Fit disc brake to rear wheel. The frame has the correct mounting holes, although the hub doesn't. I have ordered a Shimano M475 rear hub, although it looks like I am using a screw on design (M475 is a cassette one). I can take the parts back if I need to.

If I am going to buy a new wheel, I would want it to be the same as the front wheel (black spokes with silver rim edge). However, are there any screw on designs that have 6 bolt mounting holes for a disc?

My other option would be to buy new spokes for this, a 7 speed cassette and use my new hub and exisiting rim to complete the build.

Which do you see to be the easiest / cheapest option?

Andy B

deffo a screw on freewheel

I don't think you can get disc hubs that accept screw on freewheels

You can get 7spd cassettes but you would also need a spacer as well to go on the 8/9spd freehub body

Probably cheaper & Deffo easier to just buy a full wheel rather than haver the old rim rebuilt onto the new hub

sanins192

So can you tell me anywhere I can trace somewhere to get a new wheel that is the same as the front one (black spokes and same rim) that has a cassette style freehub and bolt holes for discs?

BTW I have a spacer for the 7 to 8/9 freehub.

stu8975

2009 G4 has a rear disc wheel...looks pretty much same bike as yours but with 2 discs instead of 1...still has 21spd aswell...whoever suppliers them should be able to get hold of one for you or wherever you bought it (if bought new). Your best chance would be to go the shop where you bought it and check the 2009 model to see if the wheel matches what you want then ask then to sort a price out..prob be looking at £35...then order accordingly..or go to you LBS and see whats on offer...but finding an exact match (same rim/spokes) outside of a Land rover bike dealer will be nighe on impossible...you can pick up a pair of disc wheels (cassette type) for around £90

http://www.2x2worldwide.com/LR2009/G4.html#

sanins192

I am probably being too fussy here, but that doesn't look to be the same rim as my current bike. Is there anyway I can work out what the make is and buy a similar looking and correct one for this build?

If I were to buy this wheel (Land Rover G4 2009), would I need a new sprocket set as well? Can you tell if that is a cassette or screw on design?

THANKS!

stu8975

your rim should have a sticker or stamp on the rim to say the make of it...the reason the 2009 ones are slightly different is that they are disc rims (no silver braking surface).

7spd wheels are more than likely screw on...only seen shimano 7spd cassette types.

sanins192

Out of interest, how much would a bike shop charge for a wheel build? If I gave them all of the parts and they built the wheel, attached the gear cassette, lubricated it all so I could slip it into my frame at home, what will I be expecting to pay?

redvee

An off the shelf machine built whel will be the cheaper option but the chances of it matching the current wheel are slim, a handbuilt wheel with the new hub and old rim will cost nearly as much with P&L.

Shopping list

New wheel off the shelf or rebuilt wheel with new hub & spokes/old rim.
7 speed cassette
4.5mm spacer
Rear mechanical disc calliper/rotor
New rear brake cable inner
Longer brake outer.

Anything I've missed? Anybody else want to add prices to the above?

stu8975

my lbs charges around £30 (depending on what spokes you buy...normally £10-£15 labour), but prices vary alot it seems....if you built it to the shimano hub you were on about, you would also have to buy a 7spd cassette (£10-£15)...is the hub 6bolt disc or centrelock? then whatever brake you want

stu8975

But if you absolutely have to have matching wheels...buy a new pair...after all..if you build the shimano hub on the rear..it wont match the front hub...i would just buy a new rear wheel and be done with, and a cassette, and disc brake.

sanins192

Thanks for all of this help. I don't mind the hubs not matching. They are both black which is all that matters. It was just the fact that my current wheels are all black apart from the actual rim which is silver. I quite like this look and it would look odd to have a different back and front wheel.

New wheel off the shelf or rebuilt wheel with new hub & spokes/old rim.
7 speed cassette - Have seen for £15
4.5mm spacer - Already bought (£1.50)
Rear mechanical disc calliper/rotor (bought to match front £25)
New rear brake cable inner - Comes with disc brake
Longer brake outer - "

Halfords charge £25 for a wheel build. I think I am right in saying my local bike store will do it for a lot cheaper. If I were to have it built, do I need to provide the spokes or will they?

stu8975

i would avoid halfords altogether...phone a few bikes shops that are near to you and see what they say...it would be better if they supplied the spokes unless you can calculate the correct length..either way the price for them should be similar..dt spokes are recommended..be prepared for them to talk you into buying new wheel though. its the easier option

sanins192

Thanks for all this help. I have found a wheel in Halfords that is similar to my currwnt wheel, so I may return the hub I bought and purchase a new wheel and 7 speed cassettee.

(I should really start a new topic for this, but hey):
If I did opt for a 8 or 9 speed casstte to fit my new wheel, would the only modification be on the gear shifters, replacing the small disc with numbers on it, and changing the cable tension? Is it possible (or advisable) to purchase a 9 speed cassette for my hub and change the shifter parts? Are the two extra sprockets larger ones or smaller ones?

stu8975

nope you would need an appropriate chain if you went to 9spd aswell as shifter/cassette..as far as the extra sprockets go..you prob have a 14-28 with 7spd..a typical 9 spd would be 11-32 or 11-34 so you are basically gaining a larger and smaller sprocket at each end of the cassette..get up steeper hills..come down them faster

stu8975

Also..what shifters do you have..if they are dual control.(Ez fire?).brake and gear in one..then you will have to buy the whole thing..you cannot replace just the gear part

sanins192

Oh, right, thanks. I do have EZ shifters, so i think I will just stick with a 7 speed cassette. As long as the gearing is the same on the end two sprockets, will it fit my current setup?

My current gaeriong is 14-28, so what are the limitations I can go for. Could I go for a 12-XX and will it still fit my chain and gaeting setup, or does it have to be another 14-28?

stu8975

you could go for 11-34 if you wanted...you will prob have to change your chain to accomodate the larger sprocket.

http://www.wiggle.co.uk/p/Cycle/7/Shima ... 000000046/

you will find that there are other ratios available but thats up to your personal pref...most of us ride with 11-32 or 11-34

sanins192

Would 12-28 work OK on my chain?

Am I correct in thinking you need a special hub for running an 11, as it is smaller in diameter than the freehub part?