Guni for Muni - Thoughts and considerations

I couldn’t find much in a quick search, basically I would like to put out there if weather a 26er guni is more or less useful than a 29er guni over all? Broad I know hang in there. I mean until a smaller gain ration schlumpf arrives what are pros and cons at the moment. I choose to build a 29 guni and haven’t ridden a 26guni I believe for non technical it was my wiser choice of the sizes.
My first hold back was tire selection. 29’’ dont have as much range but some awesome tyres are now available and more each week!
2) 26er seemed slow on anything which should be flowing it seemed painfully slow.
3) they say 29er will roll easier over things than 26. But more effort to start and stop rolling…
4)Weight difference also is more too for 29 but nothing drastic or unmanageable.
5) gearing up. 26 sits just above a 36er on the trails. 36 with 125 on good trails is very manageable.
29 with 150mm cranks also is about a 36er on 125 cranks essentially.
6) a larger wheel is a more stable wheel. Larger wheel also steers slower too.

That’s what is going through my head currently. Thinking for slight more weight I get stability and more speed in low therefor better for the most part? And where I would gear up on a 26 theoretically, I can gear up on my 29er too?

Any thoughts here?
Why so many muni riders choose 26 over 29 to schlumpf? Is it mainly the weight and hill climbing efficientcy?
Looking forward to anyone’s or everyone’s insight
Many thanks,
Darren

It really depends on your terrain and intended use. On anything that’s not smooth, high gear on a 29er is difficult to ride. On technical stuff the low gear can be fun, but if it gets really technical you’d like to have a smaller wheel. Personally, I use my ungeared 24" for really technical terrain, and the 29er for trails where I’m riding with bikes, or mixed road and dirt rides. If I could only have one, it’d probably be a 24" or 26", because in low gear it’d be better in rock gardens than the 29er, and I’d use the high gear more off-road than on the 29er.

But I already have a 24" so I went with a 29er.

I never grew to like my 24’’ it was slow lumpy and heavy for me. And geared up I would imagine it wouldn’t be very smooth or a forgiving ride.
26 I can see would be nice but low gear its not ideal as a 29er as you agree is great on trails.
Im thinking of making 26 technical muni but really I wouldn’t ride it much because its slow 90% of mtb tracks

I feel that the G26er is the ideal size for a geared MUni on the trail, and my setup is basically the same a Kris’s; the same setup he rode for his 5-day race with mtbers, and finished ahead of many of them! I chose the 26er primarily for it’s versatility in being extremely maneuverable and responsive in 1:1, and also much beefier and stronger than a 29er for doing drops, and the wheel being smaller is less flexy as well, and has not gone out of true after more than 1,000 miles of trail riding!

And in high gear it is a virtual 39-40" wheel, and more than fast enough with a speed potential approaching that of a mtb. And another important advantage of the G26er (in 1:1) is that it climbs significantly easier than larger diameter wheels. Btw, my 29er became basically obsolete for me once I got my G26er; at least until I rebuilt it as a road-specific 700c climber. Since its “rebirth” it has become one of my favorite unis.

I feel that the G26er is the ideal size for a geared MUni on the trail, and my setup is basically the same a Kris’s; the same setup he rode for his 5-day race with mtbers, and finished ahead of many of them! I chose to gear up a 26er primarily for it’s versatility in being extremely maneuverable and responsive in 1:1, and also much beefier and stronger than a 29er for doing drops, and the wheel being smaller is less flexy as well, and mine has not gone out of true after more than 1,000 miles of trail riding!

And in high gear it is a virtual 39-40" wheel, and more than fast enough with a speed potential approaching that of a mtb. And another important advantage of the G26er is that it climbs significantly easier than larger diameter wheels. Btw, my 29er had been gathering dust after I got my G26er; at least until I rebuilt it as a road-specific 700c climber. Since its “rebirth” it has become one of my favorite unis.

I also find the 29" wheel to be the best all around fixed wheel size, BUT if it was geared up 50% I am not sure where I could ride it, probably on gravel and dirt roads, but probably not on single track.

I think you need to be able to ride the guni in high gear a lot of the time, otherwise it’s just extra weight. Mark in Australia has about as much “guni racing” experience as anyone, he was racing a 24guni and moved up to a 26guni; he also went to a lighter weight and lower profile tire.

Riding a guni is a compromise due to the large gearing step, there’s no way around that issue right now, so you should pick the smallest wheel you can stand riding (26"?) and try it geared. You can always build it into a bigger wheel later.

Keep in mind that riding a geared hub uni in high gear is harder than riding a comparable fixed hub uni (24guni vs 36fixed). Think stability at speed.

If there were a 1:1.33 Schumpf, then I’d say build a 29guni.

Terry, Ben and Tholub

Thanks guys i see 26 will probably gear up on more, climb more and steer quicker this alone are better than my 29. 26 i would crank out more geared up than my preservative pace on 29 geared upped
After hearing about Bens Velocity 35 tubeless setup i have decide to swap my hub to a blunt 35 and roll tubeless in my Kh26 frame. effective 39 offroad will be nicer than my 44 or so…
This leaves me with a moment hub and 29er frame so Ben might be happy to hear i will soon build a wheel for a superlight tubeless XC. not sure if i will go 650B or 29 for that one.
cheers again

29 with 3 gears (undergear, direct, overgear) is the XC solution !
Let see in the near future may be …

Undergear? Sounds great
Mechanical nightmare maybe to build into a Uni hub and keep weight friendly though.

Would make a 29er a hill climbing beast!!!

Look at that :

If you build it, we will come! At least I sure will.

I think the best argument for a G26er is that you have the ideal of opposite extremes; a 26er/39er. For trail riding, a 39er already has a faster speed potential than a 36er, and the climbing and handling ability of a 26er, which also has the best tire availability.

The smaller 26er rim is also stronger than a larger diameter rim, so it will stay true longer and hold up better under more extreme use. Kris knows his stuff, which is why he opted for the G26er. It is simply the ideal for a geared MUni.

Btw, I took my KH 24 MUni out for some technical riding recently, and was struck immediately at how slow it was, even with 125’s, and how long it took to get anywhere. And the 4 mile trip back which was mostly downhill was plain tedious compared to my G26er, which in 1:1 is noticeably faster than my 24.

Im still reading the Multi geared hub thread its massive and great read!
One day soon i hope, one day

Only strength and failure seems to be the concerning topic

Thanks Terry, You cut through all the minor details going through my head and bring it back to basics.

Considering i need to change my rim and i have both 26 and 29Kh frames on hand can i throw a curve ball… 26guni or 27.5 guni

Ben has confirmed the agile and light 27.5 is a useful Uni. The tyre we ideally can run tubeless comes in these 2 sizes. Any thoughts here?
I am thinking geared up large than the effective 39er might be getting less useful like my 44" i dont shift into as much.

If it was Kris’s choice for a 5 day Race should be my wise selection for a 4 day race. 29er… why did i go there :o silly

Ben, Can you convince Terry to go tubeless your think? Im sure he would love the SuperGravity’s. I love Schwalbe so selling me on tubeless was easy. Took a bit to convert over to 35mm rim to not be to concerning. I will drop pressure if i feel if the rim isnt as wide as im used too

Thanks for contributing to this thread all you Guys.

I see some of you live near one and other. Would be great to one day catch up and ride if the day eventuates one weekend

I have both a 29 and 26 guni. I ride both of them on trails. The 26 can handle steeper downhill in low gear than the 29. I tend to ride both of the gunis for XC so that is not so much a factor (Of course, I was just in Colorado with the 29 guni and found my self occasionally on some really steep DH that I had to walk (left the brake at home)). For true tech DH, I still ride the ungeared 24. I like the 29 guni in high gear better than the 26 for really fast, swoopy non-technical XC. It really runs smooth around the corners at high speed. When I ride easy trails with my wife and daughter (on bikes), I like the 29 guni, because it easier for me to keep up on downhill’s where they can coast. So it really depends on what kind of trails you ride, and your skill level. I guess the 26 guni is better all-around, but the 29 guni sure is fun too.

Hey Andy, i dont hear many riding trails 29guni. would you think you would gear up more in general overall on your 26G without considering any particular terrain?
Down hill ridablility would be more use than a more stable higher speed i imagine.

I figure switching to a 26G from my 29G my slower cadence geared up will just be a little faster leg work on the 26er?

Everything else seems more positive for a Guni in a 26" wheel compared. Weight, climbing, descending agility to name a few all favour a smaller wheel for most Muni from what i gather.

Eventually my 26guni and a 36guni to be, in my collection will never really see a 29guni ridden im thinking.

Unless a 1:1.3 schlumpf arrives soon or a multispeed as suggested only then a 29guni is a more closer ideal Muni size than 26

I love tearing up trails on a 36er more than a 29er in 44" mode.
But i like my 29er over a 26er in low gear any day with most riding.

consensus appears 26 at the moment more useful a Guni offroad than a 29. Thanks for instilling confidence to downgrade my current ride to something hopefully more versatile. Thanks for all the info and personal experiences gathered here :slight_smile:

I agree that 26 geared is the best all around muni. Don’t think anyone has mentioned it yet but it’s also much easier to travel with it, especially when flying.

A 29 geared would be fun on easy trails but most trails I would think you would probably be in low gear the majority of the time thus kinda defeats the purpose of having a gear.

If the trail is not too steep, I can ride the 29 in high pretty much everywhere I can ride the 26 in high gear. In those situations, the 29 corners better at speed than the 26. I was on a slightly downhill, relatively smooth section of single track on the 29 in high gear with some mtn bikers behind me for quite a distance a few weeks ago. At the end of the section, they commented that they were waiting for me to “blow up” at that speed, which didn’t happen. If the grade is too steep down, the 29 gets going too fast in high. For trails with steeper downhill, I prefer the 26. For flat and a little rough, the 29 has a little advantage in most cases.

I have been experimenting with my 36 guni on trails lately. I even get into high gear on that beast on trail sometimes. Sure makes the other 2 seem easy.

Geared 36r in high gear on a trail? You are a wild man!

36G on the trails, You are a speed maniac and i like it. Top efforts there

Had i not wanted to run tubless i may have stuck it out the 29guni for trails and for the time i dont shift up i am sure i make that time in lower gear over a 26". At the end of a day im beginning to think in muni one is no ‘faster’ overall on the trails than the other. 26G for versatility and 29er for stability and pure pace. Versitle, maybe lighter weight slightly, particularly improvement for climbs and descents. I need to hang up the 29" rim, dust off my relatively new 26 frame and go with the majority.

Thanks Tuscon for sharing your insight and ability geared out in the sticks. I can imagine myself so overwhelmed being able to gear up off road on a 36 Guni that the first really big tree i try not to look at my subconscious would see my 36 guning muni days shorter than intended…

Not sure I go any faster in high on the 36 on trail than the 29. Fear is a limiting factor. :smiley:

BTW: I was able to go tubeless on the 26 but it didn’t work out on the 29.