................ I'm just a casual rider, just trails, no off road, no downhill.........................What do you recommend?

Get the cheapest

 

no off road, no downhill.

Anything at all will work fine; the only note is the RT45 have restrictions on type of pad - I'd avoid those.
The more expensive rotors are lighter and/or have cooling features.

 

Eh, sometimes I ask a question when I think I already know the answer. Thanks.

 

Personally I'd go with anything from the RT6X level on up, they use a nicer splined section which gives a better fit on the hub. The cheaper rotors use a stamped steel center section which doesn't fit on the splines as well and almost always has some play. Doesn't really affect how the brakes work, but slop in the hub to rotor interface annoys me.

 

A quick check of prices shows the RT64M only a few bucks more than the RT30.

 

Looks like the RT64 needs another tool for installation. The TL-LR15 plus the TL-FC36 ?

 

Only one tool needed, depending on which lockring you have you'll either need a cassette lockring tool or a bottom bracket tool, you won't need both tools unless both wheels use different lockrings.

 

It all depends on your hubs. 15 mm thru axle hub uses the "bottom bracket tool" lock ring. 9 mm QR hub uses the cassette lock ring.

 

Thanks for the pics, The bike has a Shimano Alfine 8 hub which uses a bolt-on axle, so I suspect it's got the BB-style lockring, but your pics will help me identify it for sure.


If I need the BB tool, is the Park BBT-9 equivalent to the Shimano TL-FC36?

 

The bike has a Shimano Alfine 8 hub which uses a bolt-on axle, so I suspect it's got the BB-style lockring, but your pics will help me identify it for sure.

If you have an Alfine this post has a good run down on the lock ring tools http://forums.mtbr.com/internal-gear-hubs/alfine-centerlock-issue-619297.html

I ended up with a no name tool with a centre pin which I drilled out. It works perfectly.

Tim

 

The bike company says it uses a Shimano/SRAM cassette lockring tool.

 

OK, with a solid axle I need the TL-FW30 tool. The guy at the bike company tells me the FR-5 won't reach, and the FR-5G and TL-LR15 can't be used because of the center pin.

Also, back to my original question, there is one BIG difference in Shimano rotors. The RT6X and up are "narrow" rotors, meaning the pad track width is narrower than the RT5X and below "wide" rotors. So, the wide calipers (most mechanicals including the BB5 and BB7, and my Tektro Aquila) will wear on the rotor arms, not a good thing.

 

Also, back to my original question, there is one BIG difference in Shimano rotors. The RT6X and up are "narrow" rotors, meaning the pad track width is narrower than the RT5X and below "wide" rotors. So, the wide calipers (most mechanicals including the BB5 and BB7, and my Tektro Aquila) will wear on the rotor arms, not a good thing.

Not sure of your question, as your statement is probably correct, that running narrow track disc with wide(r) pads will likely to cause uneven disc/pad wear. If you use multiple concave washers, you maybe able to position the caliper so the pads don't run over the arms. But you may have to grind the top edge from time to time. I have RT5 and perhaps it's heavier than RT6 but I can't really tell while I'm riding the bike

 

Just an update. I ended up with the Shimano SM-RT54 180mm discs and B01S resin pads. This works nice. The Shimano TL-FW30 Freewheel Remover works fine on the Alfine hub.