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1993 Koga-Miyata World Traveller project (66cm frame)

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1993 Koga-Miyata World Traveller project (66cm frame)

Old 02-12-24, 04:24 PM
  #176  
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Originally Posted by Kobe
Seems odd something called the Graveler is riding on turquoise tires but I'll withhold judgement until I see a complete picture.
Ha, it's definitely no longer purely functional at this point but if they are no more expensive than the tanwall/black option, why not try some colour in your life.
It's supposedly the same rubber compound as the black version.
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Old 02-13-24, 07:57 AM
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I hear good things about that tire. Let us know what you think.
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Old 02-13-24, 12:24 PM
  #178  
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Originally Posted by Kobe
Seems odd something called the Graveler is riding on turquoise tires but I'll withhold judgement until I see a complete picture.
We Europeans have our traditions when it comes to color matching, that need to be honored.

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Old 02-14-24, 06:13 PM
  #179  
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So while I wait for some colourful tyres, I was also thinking about my gearing since I am slowly planning to go touring again this summer.

Currently I am of course running a 48/28T in the front with an 11-speed 11-32 in the back. This gives me a 499% range with a 24.3 - 121 low and high.
The issue that I ran into a couple of years ago in the mountains is that the low gear really isn't low enough for loaded touring for me and I do actually use the 48 x 11 on longer stretches on the flat. That seems to be correct from what I've read online.



This setup requires a 41T derailleur capacity which my Shimano Deore 2x11 derailleur does. (RD-M5120-SGS) though Shimano is known for being conservative with their capacity rating. From what I've seen online is people running these succesfully with 50/34 x 11-40 for a 45T capacity.

So if I want to improve my gear range I have a couple of options.
  1. Get an 11-36 cassette for more climbing abilty without losing top-end for about €60+ (561% range, 45T capacity)
  2. Get both a different set of 46/26T chainrings AND an 11-36 cassette for even better low-end at the expense of high-end for €150+ (579% range, 45T capacity)
  3. 44/26T x 11-40T for off-road touring capability for €160+ (571% range, 45T capacity)
  4. Increase the capacity of the rear derailleur with a Garbaruk replacement derailleur cage + larger pulley wheels and combine any of these.
    • Bonus: I can embrace my inner European by getting outrageous colour combinations. I'm thinking silver cage, blue pulley wheels and a golden chain.
  5. Push my luck by keeping the 48 in front, but stealing a 26T from another bike in combination with a longer cage + 11-36T cassette for about €200 (604% range, 47T capacity)
    • The Ultegra front derailleur is rated for a 16T difference and is already pushing 20T but... from a previous post it looks like there is room to push that to 22T.
    • Upside of this one over the other options would be the much smaller steps between gears on the high end.
  6. Try any of the above by replacing the rear derailleur with a (slightly ugly IMHO) Shimano SLX (RD-M7120-SGS) 2x12 model that already has 45T capacity + 11-42 cassette.


So in visual terms:

#1) Lowering the low a bit

#2) Droppin' it down

#3) Pie plates in the back, tea cups up front

#5) Pushing that luck

#6 It might be ugly, but it does get you up mountains


Something to ponder as I make plans for the summer and start budgeting.

In the meantime, some shiny silver bits that inspired this train of thought.

Last edited by JaccoW; 02-14-24 at 06:46 PM.
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Old 02-15-24, 08:49 AM
  #180  
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Well I have an answer from Garbaruk as to why their website states the cages are only for 1X drivetrains.
Thanks for your inquiry.It won’t work, 2x cage has the upper pulley in different place so they cannot be her interchangeable.
If you have any questions, please let me know.
Which kind of makes sense.

That seems to leave me with option 1, 2 or 3. Currently, first swapping in a 11-36T cassette and then moving in a 46 and 26 chainring seems to be the most sensible option with good close gear jumps in the high end.
So slowly moving this bike to a 46/26T x 11-36 11-speed drivetrain.



But I am still curious about the Garburuk.

So I have a silver 12-speed cage I found second-hand on the way for about €45.


Worst case scenario I have my first part for an 11/12-speed drivetrain for the 1999 Koga-Miyata Adventure...



EDIT:
Garbaruk's comment about the pulley wheel being in a different place makes sense when looking at them side by side:

- Original image from NSMB.com -

What you see here from left to right:
  • Garbaruk cage
  • GRX RD-RX812 (42T max) 1x
  • GRX RD-RX810 (34T max) 2x
Apparently 1x drivetrains have the pulley closer to the cassette in the higher gears to improve shifting performance. Hence the bump.

Last edited by JaccoW; 02-15-24 at 10:01 AM.
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Old 02-19-24, 07:10 AM
  #181  
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The new tyres arrived today!

To my fingers the Panaracer Gravelking Slick TLC feel pretty grippy but we'll see how they do on the road and dirt. Weight also seems to be good at 336 gram per tyre. I haven't mounted them yet since I don't have any tubes so that's something for later today or tomorrow.

I also test fitted the new front wheel. It seems to be a good fit to both the bike and the theme.
Currently thinking on replacing the headset for the IRD Double Roller Drive headset. I noticed the original Shimano Deore has become a little notchy and has started to *click* into place on the straight. That's not how it is supposed to work.
The IRD is silver though. On the other hand, there are plenty of silver components on the bike already so what is one more? I already know I like how it rides from the Batavus Randonneur GL.

Opinions?







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Old 02-19-24, 02:02 PM
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Compared to the current front wheel with the Koga Beachracer hubs:

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Old 02-20-24, 11:01 PM
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Those tires are gonna match the paint really well! Looking forward to how it ends up!
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Old 02-21-24, 08:35 PM
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Another approach to climbing, rather than equipping the bike with lower gears, is to walk up the hills. Everything involves compromise.
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Old 02-22-24, 01:45 AM
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Originally Posted by noglider
Another approach to climbing, rather than equipping the bike with lower gears, is to walk up the hills. Everything involves compromise.
I think I heard the term "two foot gear" on the Clydesdales & Athenas subforum. Either that or @gugie said it. Whomever did, it was good! I know I can only go so low before the "speed" gets below my ability to balance. Thus far, that ratio is well below 1:1 and some combination of incline and fatigue. To be clear, I have stepped off and walked many a time. Seattle will do that.
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Old 02-23-24, 05:54 PM
  #186  
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Originally Posted by noglider
Another approach to climbing, rather than equipping the bike with lower gears, is to walk up the hills. Everything involves compromise.
You are right of course but that's not always an option while touring. A few years ago I rode from a valley in Ascou in the French pyrenees mountains to Pas de La Casa in Andorra. That was 31 km (~19 miles) of climbing at an average grade of nearly 5%. Some spikes of 15%.
While that distance is barely anything, it was the constant climb at too heavy a gear that I really hated. I would rather have spun up that mountain at slightly above walking speed.
There is no way to just get off the bike and walk that in a reasonable time.

But... I think an 11-36 is going to give me most of what I need anyway, even without resorting to the lowest possible front chainring the cranks might allow for.
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Old 02-25-24, 09:54 AM
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Originally Posted by RiddleOfSteel
Those tires are gonna match the paint really well! Looking forward to how it ends up!
Here is an early sneak preview.





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Old 02-25-24, 10:37 AM
  #188  
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While there is no shame in walking and I have done it many times while touring. A low gear is always easier to me. With a stiff climb and plenty of load it's amazing how slow you can balance.
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