The Colnago expander plug feels heavier than it is: 55 gms. [CDATA[ }); infinite: true, Seems like a good setup.
If you'd like to get the additional items you've selected to qualify for this offer. Please select more than 2 or more bikes for comparison, Wolf Tooth Compression Plug with Integrated Spacer Stem Cap. 
Another option for threadless headsets is the expansion plug system. var name = cname + "="; Terms of Service -
If you're in the market for a new fork, take a look at Alpha Q.
I like mine. $("#closeForm").click(function(){
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Prepping the stem by sanding & polishing the inside removing all burrs & stress risers (see photos below).
when i had the head doc on my pace frame, i could feel when it came loose, could feel it.. (like a knocking) it always turned out to be the head doc in the sterrer tube.. i would tighten it back up refit and tighten the topcap redo the stem bolts and it would be fine again.. untill the next time. The problem is my current setup uses a compression plug. We Price Match | See Details, Take an EXTRA 10% OFF | Use code EXTRA10 | SHOP NOW. } This system is especially popular with the carbon steering columns. slidesToScroll: 1, $(".slick-next").css("display", "none"); }
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$("#responseLine").hide(); Classic and Vintage Bicycles: Whats it Worth? It is also possible to drive the old nut completely through the column and out the bottom. Compression plug will work, but you can also make your own starnut tool: I have never owned a star nut tool and I have installed many of them safely. Carbon steerer tube= compression bung for carbon. I've seen plenty of things that shouldn't have been done Cannondale uses a starnut.
function loadSeatpost(letter){ Bike Star Nut Bicycle Bike Headset Compression Plug Expander Stem Top Cap. $(".delivery-cost:contains('FREE')").not(':first').parent().parent().remove() Alpha-Q uses that too. One is that you can have one bike set up to quick change between road bars and tt bars with cable quick releases. All rights reserved. Hm, Cannondale is one of the few companies, which has a clearly defined manual about carbon steerer and star nuts. //KioskCode The star-nut outer diameter is slightly bigger than the inside diameter of the fork column. }
If you Buy It Now, you'll only be purchasing this item. The Official Bike Forums Cafe Press Store, Adaptive Cycling: Handcycles, Amputee Adaptation, Visual Impairment, and Other Needs. like mentioned above starnuts are cheaper and less hassle.. Expander= cost more, weigh more, do same job. Use the correct expander plug. //clearBikeDates(); This technique works ONLY if you use the newer longer TNS models. It's never a good idea to hammer a sharp metal object into a carbon steerer. Plus, if you decide you need to cut the fork again, you don't have to reset the nut or reinstall a new one. Yes, this is for a Cannondale fork with a carbon tube. It really helps if you can provide pictures and/or video.
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Use a small amount of removable thread locking compound on the threads of the new screw. $(".slick-prev").css("display", "none"); starnut nice and simple and does the job.. A new stem etc makes no difference. My understanding is on a carbon steerer a compression plug is REQUIRED. Professionals with very long (130mm-140mm-150mm) stems that can result in a too-long of lever-arm where the pro cyclist (i.e., sprinters) can basically twist the stem with such force that they can snap the carbon steerer tube. My fork has a carbon steerer tube and don't want to switch to the star nut type.
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"); 8 speed chain and 8 speed chainrings on 9 speed triple cranks? The Carrera Hardtail combined thread - come on all you Carrera's. Hold the TNS-4 straight and in line with the steering column. } NOTE: In-Store Pickup is available at the Riverside Will-Call location only. // ]]> var bikePresent = false; It's worked every time I've done it. });
All it needs to do is resist pulling out when you screw in the bolt to set bearing preload. Stock Status
}); window.gapi.ratingbadge.render(ratingBadgeContainer, {"merchant_id": 17229, "position": "BOTTOM_LEFT"}); Only issue I can think of is that the wall thickness is smaller on non-carbon tubes, so the inner diameter may be too large for the compression plug to handle. $("#seatPostGraphic").attr("src", "https://www.jensonusa.com/globalassets/product-page-assets/seat_post_" + letter + ".jpg"); Engage so most of the stem sticks up above the column. Contact Us -
For certain parts stiffer is more important than lighter. Introduce Yourself / Gallery - Please use metric weights.
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OP, you might want to see what you think of DaveSSS's method in this thread: Hammering a star nut into any carbon fork will ruin it.
{"modules":["unloadOptimization","bandwidthDetection"],"unloadOptimization":{"browsers":{"Firefox":true,"Chrome":true}},"bandwidthDetection":{"url":"https://ir.ebaystatic.com/cr/v/c1/thirtysevens.jpg","maxViews":4,"imgSize":37,"expiry":300000,"timeout":250}}, Recent sales price provided by the seller, Add to cart to save with this special offer. I bought a handful of cheap compression plugs off AliExpress for $3 a piece. If it is necessary to install another nut, simply use a punch and drive the first nut down until deeper than the new nut will sit. This is a private listing and your identity will not be disclosed to anyone except the seller. $("#responseLine").show();
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I seem to recall that I bought one from ti cycles ebay store for like $12.
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} $("#seatPostGraphic").attr("src", "https://www.jensonusa.com/globalassets/product-page-assets/SEATPOST-GEO.jpg"); On the Competitive Cyclist site, in the copy for the Problem Solvers headset compression plug, it says: "As you know, you don't pound a star nut into a carbon steerer, rather you use what's known as a compression plug to hold the fork in the frame.". I wouldn't imagine so, other than a few extra grams, but thought it'd be worth asking. } }, 500);
} This will make the nut unusable. Subscribe and receive a 15% off one-full priced item on your next order. // Special Seatpost graphic Like the ones made by Exotic (CarbonCycles). Orange Seal, does it live up to it's fame. I sure am glad that my new fork has an aluminum steerer tube.
Another could be while you are trying to dial in the fit of a new bike. There is a cone at the top and bottom, and a hollow bolt passes through the sleeve. A star nut is a spring, loaded under tension that pushes outward on the inner wall of the steel steerer tube and as such can damage a carbon steerer tube. $.fancybox.close(); } $.post("/API/Product/CustomBikeRequest", { Name: $.trim($("#customBikeName").val()), Orders for in-stock items placed by 3PM PST usually ship on the same day. I suppose I was only weeks away from certain dental work. $("#clear-cart").after("
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$(".delivery-cost:contains('FREE')").siblings(".delivery-date").html("Standard (3-5 business days)"); if($(".delivery-cost:contains('FREE')").length > 0){ Most headset come with something or most bikes already have something fitted so use them. [CDATA[ var bikeDateRun = 0; The TNS places the nut about 15mm (9/16) below the top of the steering column. I thought that was stupid and replaced it with a compression plug. Cannondale says starnuts are fine with their forks and you can use a regular top cap and screw and the weight is probably less than the epoxy solution. A forum for folks with questions about bicycle repair. Star Fangled Nut and Expansion Plug Installation. if($("#seatPostGraphic").length > 0){ Threadless headsets are adjusted by pressure on the top bearing race.
}); Find an appropriate compression/expander plug or epoxy in a threaded aluminum insert. for(var i = 0; i
The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. loadSeatpost(null); "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail.". window.location = "/Jenson-USA-Gift-Card?amt=" + giftAmount; I have an older 1" (25.4mm) carbon fork from Nashbar. $(".bike-alert-small").remove(); As others noted, use what is supplied by the fork manufacturer whenever possible. $(".seatPostElement").on("mouseover", function(){ } While the Corona store is open, they will NOT be facilitating online order pickups.
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}); The epoxy solution is fairly permanent.
Copyright 1995-2022 eBay Inc. All Rights Reserved. The stem bolt(s) must be loosened, which makes the stem effectively a spacer during the adjustment. After Sunday I have replaced my Hope expander with the simple starnut, make sure you get the starnut seated correctly i.e straight. bikeDateRun++; There was a recent thread about the Wolf SL fork and how much you could cut after gluing the insert, but they seemed to have done away with it. }); It should be fine. setTimeout(function(){ $(".brand-bottom-content").show(); }, 3000); I saw the Alpha Q sleeve when I was doing my research but it looks like the sleeve and adhesive used would cancel out any weight advantage of a carbon steerer. Works really well. if(window.location.href.indexOf("JensonUSA-Gift-Card-") > -1){ dots: false, $("#priceMatchContainer #comments").removeAttr("id"); // IPI comments fix I'd either buy a star nut for $1.50 and hammer it in or pay your LBS a visit.
Token makes some substitutes but they come out to around 38 gms. return c.substring(name.length, c.length); Thanks. Another is that at my age, 52, I am currently very limber and can use most of my bikes with the stem with little or few spacers below. The top cap looks like it will only fit a star nut assembly. if(letter == null){ // ]]> $("#covid-messaging").slick({ It's not a matter of preference is it? It can also help maintain alignment to use the stem as an alignment guide. I'm not saying you can't f it up but, you shouldn't be afraid to try. It depends on the compression plug. $(".cart-item-detail-proditemnum").each(function(){ $(function() { $.fancybox("#customBikeMessaging", { autoSize: true, maxWidth: 600, minHeight: 700 }); Also, if you ever have to shorten the steer tube, you can. } And that huge Colnago plug just about negates any weight advantage of a carbon steerer vs. alloy. Bike: $.trim($(".product-name h1:first").text()), Hokolite Lux-Bike 1500 Lumen Bicycle Light Review, Skratch Hydration Mix, Energy Chew and Bar Review, All Exercise is Good, and Vigorous Exercise is Better. Use 3mm hex wrench in end of screw, and thread into body, leaving about 10 threads exposed. Appraisals. null, "json");
variableWidth: true Install stem onto column. slidesToShow: 1,
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Never had an issue with this plug pulling up or failing to bite in to any fork I've stuck one in (unlike a cheaper one I tried first). The headset adjusting cap and bolt then fit into the top of the expansion plug. - eBay Money Back Guarantee - opens in a new window or tab, cleared payment - opens in a new window or tab, - for PayPal Credit, opens in a new window or tab, Learn more about earning points with eBay Mastercard, - eBay Return policy - opens in a new tab or window, - eBay Money Back Guarantee - opens in a new tab or window. In the NYC area where prices are generally higher than most my LBS charges $5 for a star nut install. document.body.appendChild(ratingBadgeContainer); Same day shipping on most orders if placed by 3pmPST. Order a couple of different ones and return the one that you don't use. Log in. }
Discuss light weight issues concerning road bikes & parts. $("#closeWinDone").show(); Mount the nut with concave side toward tool thread. Bike Build Process
window.gapi.load('ratingbadge', function() { Putting a socket on it and hammering the socket, or simply just putting an extra bolt and carefully hammer it down. $(".container-account").before("");
Strike the top of the TNS-4 with a hammer to drive in the star-nut. I've got 3 in service across my fleet- one is in a carbon steerer (Whisky #7), the 2nd in an aluminum steerer (Manitou Mezzer) and the last one is in a steel fork (Surly Ogre). $("#mainForm").hide(); } The TNS-4 is designed to help guide the starnut straight as it is pressed into the inside of the steering column. I read that compression plugs are the best type for carbon. slidesToShow: 1, } I use them on all my bikes, both carbon and metal steerers.
} The star nut is designed not to pull upward. Get free Standard Shipping with your $50 purchase today! The star-nut is basically designed not to be removable. I've been running head doctors for 5 years, they came with hope headsets. Press question mark to learn the rest of the keyboard shortcuts. Find an appropriate compression/expander plug or epoxy in a threaded aluminum insert. $("#amount").val(urlParams.get("amt")); var giftAmount = window.location.href.substr(window.location.href.indexOf("JensonUSA-Gift-Card-") + 20); Email: $.trim($("#customBikeEmail").val()),
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setTimeout(function(){ //setInterval(function(){ clearBikeDates(); }, 1500); As with most all threaded fasteners, grease or oil the threads. Thread the star-nut onto the threaded stud inside the TNS-4. }); The nut is installed. It came with the star nut, but I was wondering if a compression plug would be any more/less better. if($('.cart-item-list').length > 0 && bikeDateRun < 5){ $(function(){ $("#covid-messaging").slick({ Thanks C-40 for the reply. PLEASE NOTE:
I know, I knowwe're all weight weenies.
1" compatible compression plugs are available but I agree - they are most likely scarce. (In my opinion, the best is from Cervelo.). Broken bottom bracket? If you can't find a 1 inch plug, then gluing a tee nut into the steerer may be your only choice. variableWidth: true There are various reasons for spacers above the stem. For sale - Pictures are mandatory 22-3-13, http://www.cornercycle.com/custom_carbo insert.htm, http://www.cannondale.com/asset/iu_file ote_en.pdf. if($(".order-confirmation-header").length > 0){ // ]]>. Is there a way to make this top cap work on a compression plug type assembly? Why not use an external expander instead? You are currently on the Park Tool United States website, but you havent set a preferred region.
Place TNS with nut inside stem and column and tap downward. I don't see a real benefit to using a starnut. if($("#priceMatchContainer #comments").length > 0){ Do Not Sell My Personal Information -. }
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slidesToScroll: 1, Thats a pretty interesting document from Cannondale. $(".bike-alert").remove(); This allows the adjusting bolt to thread fully into the nut for adjustment pre-load. else{
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if($(".coupon-banner-right-2").length < 1){ Colnago made it that way to offset stem clamping forces. You might want to try a lower position before you make it permanent by cutting. if(bikePresent){
It can also work to drill out the center of the nut, and then tap out the remaining pieces. if($(".product-name h1").html() == "JensonUSA Gift Card"){ Either.
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I recently purchased a Zipp 145 stem and noticed that it also came with a very cool Zipp top cap. }
} The walls of the carbon fork are thicker and the compression plug is made for that. } speed: 300, Only up to three bikes can be compared at once. Your email address will not be published. It's never a good idea to hammer a sharp metal object into a carbon steerer. Basically, when manufacturers machine the stems, some leave a small burr all around the inside of the stem which can result in an excessive concentrated pressure on the carbon steerer tube, i.e., stress rider. I've been researching this subject lately for my dream C50 build. while (c.charAt(0) == ' ') { Hold TNS over steering column and tap on top on TNS with ball peen hammer.
The inner mandrel will rise upward and the outer housing is slid over the column. It wouldn't expand enough to fit the aluminum one. }); My current compression plug is the new version that has the large diameter internal thread as part of the top capjust like the. Do not tighten any upper pinch bolt. View cart for details.
I can do this in 5 minutes on one of my bikes, but when the tt bars are on, there are spacers above the stem due to different riding position.
In other words, it is designed not to be removable. $(".seatPostElement").on("mouseout", function(){
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The inner diameter of the carbon steerer is 20mm at the max. Pressure is applied when the bolt in the top cap is tightened. } // ]]>
But I wanted a long one so I ordered a couple different ones from Amazon and eBay just to compare. The bolt is threaded into the star fangled nut which be fitted into the inside of the fork column.
Thank you for signing up for email specials! They have a full carbon steerer but use an aluminum sleeve inside the top of the steerer that has a pre-installed star nut, so you can use whatever top cap you'd like.
// seatpost helper $(".container-default").css("padding-top", "0px"); By logging into your account, you agree to our. $(".delivery-cost:not(:contains('FREE'))").parent().parent().remove(); infinite: true, For me, it's not worth it (not the cost, the weight loss). Hold tool aligned while striking TNS.
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This can lead to potential stress cracking of the carbon steerer tube, not good. var ratingBadgeContainer = document.createElement("div"); Install top cap and headset adjusting bolt into expansion plug hollow bolt. }, 500); if($(".container-account").length > 0){ My understanding is on a carbon steerer a compression plug is REQUIRED.
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This article reviews installation and removal of "star-nuts" into threadless fork steering columns, as well as "expansion plug" installation. var ca = decodedCookie.split(';'); A star nut is a spring, loaded under tension that pushes outward on the inner wall of the steel steerer tube and as such can damage a carbon steerer tube.
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Continue driving the nut until the driver meets the outer portion of the tool.
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