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PivotMach 4SL Carbon Team XTR Live Valve Mountain Bike
Item # PIV1WU3
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What do you think about this product?
March 12, 2020
what is the weight?
November 26, 2019
You haven't really lived, until you've ridden Live Valve In a world where we have to put up with words like downcountry true XC bikes are becoming few and far between. The Mach 4 SL is Pivot's XC race bike, and it rides like it. It is super efficient, comfortable while seated, and is lively handling bike. I find that people often gravity towards riding "too much bike" for their given terrain. It was refreshing to ride a true XC bike, that was efficient in everyway. It changed the way I rode. I didn't shy away from a steep climb, or from adding in an section of trail to my ride. I found myself riding longer, and farther on such a light, efficient bike. What really shines on this particular bike is Fox Live Valve. Put simply, it works really well. It makes perfect sense that a computer can open and close valves in your suspension infinitely faster than a human being can do. And in practice it matches the suspension to the terrain you're on as quickly as you can ride it. It's such a novel feeling on bike that it can instantly switch the suspension from being open to closed. It actually made my rides more interesting to find some new terrain, or features and see how the Live Valve would react. The most interesting scenario is to come out of a compression and begin pedaling hard on the other side and find that the suspension has already been switched to firm setting. No nobs, no levers, nothing cluttering your handlebars, it just works. In terms of parts specc'd on the build, I'm really happy to see a dropper post on this bike. If world cup XC racers run droppers on their bikes, no reason to miss out on all the convenience and safety that come with a dropper. I'm a little surprised to see a 160 brake rotor in the front, but I guess that's part of the race bike ethos. Pivot builds bikes with amazing attention to detail, that shows out on trail. If you're looking for ultimate performance in an XC bike, the Mach 4 SL is your ride.
November 20, 2019
wish I would have never ridden this bike
- I've used it several times
I am in the process of finalizing a new mtb to build over the winter here and was about decided on the frame. I decided to spend a few weeks on the Mach 4 to compare and now it's thrown a wrench into my thought process. does live valve work, in a nutshell yes, would I love to have it, totally. The extra price does make it tough, but if you can do it, I'd highly recommend it. I have never been fond of a "lock out" button, so many wires off of my bars and adjustments are then limited. with live valve you get it dialed in and hit it hard in the hard pack flats, climbs, berms, bumpy rocks, whatever, you are just good to go. I actually really really got to like it and want it. The mach 4 SL frame is outstanding. very stable in whatever terrain, it's light, climbs well, just a great XC bike which is what I ride. I rode a S and I'm almost 5'7" and thats what I'd race with, it was just a little easier to toss around than a M. Pivot might be considered a boutique brand, and they are but I think they along with Ibis and Yeti are making phenomenal frames. The Mach 4 SL is a real race frame, it's fun to ride in general but it will go fast and handle an XC course superbly. End conclusion, would I own it yes, will I buy it, possibly.
October 7, 2019
Live Valve x Pivot Impresses
- I've used it several times
I'm a skinsuit-wearing, watt-counting, 100mm travel-loving XC nerd with likes his 2.2s, remote lockout, and aero helmet. I prefer a hardtail when I can swing one. The list of XC full-suspension bikes that I like is pretty short, and Santa Cruz's Blur TR currently sits at the top. Because of my obsessive focus on efficient pedaling, I was intrigued by the Live Valve system, and I jumped at the opportunity to demo it. I took 2 primary conclusions away from my week-long demo: 1- Does it work? Yes, mostly. It stiffens up when it's smooth/flat/uphill, and it opens up when it's rough/downhill. I personally wanted it to be stiffer climbing, and more reliably open descending. That said, I'm probably more sensitive than most folks will be. 2-Is it worth the money? For me, not yet. If I'm completely honest, I didn't like Live Valve more than a good lockout system like you get on the Blur TR. It's incredibly impressive, and it actually cashes the checks that it writes when it comes to performance (I'm looking at YOU brain shock,) but at the end of the day, I don't think that this will speed you up in an XC race application, especially if you're limited to a 4-figure budget for your next bike. If you're a non-XC rider who has the patience to dial it in perfectly, and you're not concerned about spending a pretty penny to have the latest and greatest, I can give it my endorsement. I'm excited to see where Fox takes the system in newer iterations. ***Full disclaimer, I did not ride this particular build. Pivot provided an X01 build with Live Valve for test purposes.***
October 4, 2019
Dream XC Bike
- I've used it once or twice and have initial impressions
This is a dream bike for sure, I don't think it gets much better than this for an XC bike. You've got top end parts, great geometry, low weight, and Live Valve! I had a chance to demo this bike and don't think I'd change any of the build parts if I owned it beyond adding a bit more aggressive tire, it's pretty well set up. I didn't try the bike without Live Valve and as it was my first time on this bike it was hard to tell how good it is, but it did seem to help a good bike through rock gardens. I want to try it further but I'd say it's well worth the extra money on a bike of this caliber, I'd upgrade to this over carbon wheels if I had the choice. The geometry of the bike felt great with a 120mm fork, it climbed really really well and felt decently capable. I had a few pedal strikes but a shorter crank would have solved that. I took the bike down a rough trail and there it really reminded be that it's an XC bike, not one of these new "downcountry" rigs, but I still liked it enough that it made me wonder what chunkier tires and a 130mm fork (not recommended by Pivot) would do... Compared the the Santa Cruz Blur Trail which I've also spent time on recently it rode a bit faster and more efficiently I think but felt a bit less capable on rough stuff. Compared to the Niner RKT 9 it rode a bit more like a trail bike - more confident but not quite as good a power transfer. These are real rough first impressions, I didn't have the chance to dial in any of these bikes beyond an initial ride.
May 23, 2019
- I gave it as a gift but have feedback to share
See attached image for Geo numbers - Claimed frame weight XS w/ shock 2,105g (4.64lb) - Claimed weight complete World Cup XTR build in medium is 20.9 lb (9.48 kg) without pedals
May 23, 2019
what size should be recommended for a 5,11 person?