Question about RTO Bicycling Complete Guide to Bicycle Maintenance & Repair

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I have dismantled a modern AHead set in order to replace the riser for a taller one. (I am mostly use to the old style 'quill' system, please note!) On this modern headset I have removed the long bolt - as one must - but now find it difficult (impossible?) to get the bolt to screw back into what I presume must be - should be - some nut or threaded element deep inside the head tube. What is the trick?? Might a nut have moved? (I can't see anything and upending the bike and shaking produces no loose nut.) On line maintenance manuals seem to ignore headsets other than making adjustments. Can anyone help? I am far from a bike shop ! Thanks Ray

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With a taller stack of spacers you would probably need a LONGER center screw to reach the 'Star-Fangled Nut' that should still be lodged inside the steerer tube.

* The SFN is designed to resist being pulled UP in the steerer, but can be pushed down.

If you CAN reach the nut with the screw you have but it doesn't start threading it could be that the nut has shifted so it's not aligned concentrically with the steerer. You might be able to reach down in there with something long and thin and re-align it. If it's a lost cause it can be pounded down out of the way with a mallet and a screw driver. Then get a new one and start over.

Keep in mind that the screw in question is NOT for tightening the stem down on the bearings. It is to make the proper adjustment of 'tight enough without wobble or bearing bind'. Then you tighten the screws on the side of the stem to maintain that adjustment.

Posted on Feb 17, 2010


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I have a 2004 yamaha majesty 400 and my knees hit the handles when turning ? i would like to slide further back on the saddle but as you may but not possible. maybe someone out there has an idea

The only thing I could think of without hacking the seating area up is to, put some taller risers on your handle bars to raise them or buy a set of mini ape hangers. Mind you, if you go too Tall with the bars or real tall risers you may need to buy all new (Longer) cables for your controls. If it were me, I'd buy a bigger bike to fit my size and frame.

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When I used grandfathers old table saw with ungrounded cord. It worked fine, I then plugged a jig saw into same outlet. It worked fine. When I laid the jig saw on the table saw there was a spark a

Check the plug that goes into the outlet. On modern plugs, one prong is taller than the other. The taller is the "ground" leg - the other is the "hot" leg. I bet that you just need to flip the plug over so that the other prong is in the "ground". If this works - mark the "ground" leg (or replace the plug with a newer one that has a taller "ground" leg).

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Quill not feeding in auto

sounds to me like a gear tooth is chipped ,broken or worn out, in your gear box (we are talking about auto feed aren't we?) or the engaging mechanism is faulty .....dismantle and inspect if you have the know how?... pete

Mar 11, 2014 | Drills

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When did isaac newton born

25 December 1642 [NS: 4 January 1643]
During Newton's lifetime, two calendars were in use in Europe: the Julian ("Old Style") calendar in protestant and Orthodox regions, including Britain; and the Gregorian ("New Style") calendar in Roman Catholic Europe. At Newton's birth, Gregorian dates were ten days ahead of Julian dates: thus his birth is recorded as taking place on 25 December 1642 Old Style, but can be converted to a New Style (modern) date of 4 January 1643. By the time of his death, the difference between the calendars had increased to eleven days: moreover, he died in the period after the start of the New Style year on 1 January, but before that of the Old Style new year on 25 March. His death occurred on 20 March 1726 according to the Old Style calendar, but the year is usually adjusted to 1727. A full conversion to New Style gives the date 31 March 1727.

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What is the shape of the handle bars on the Schwinn High Timber Girl's bike?

These are certainly not racing style bars; but the modern, hybrid riser handlebar.

They will not sweep back toward the rider as much as a beach cruiser handlebar; but could be adjusted rearward to come closer to the rider. They definitely allow for a more upright riding position than many other handlebars though.10_19_2012_7_26_19_pm.jpg

Oct 19, 2012 | Schwinn High Timber Girls' Mountain Bike...

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Display is very dim

On most modern electronics...the display is backlit LCD.They have a backlight bulb that looks like an old style glass auto fuse.Most are not user servicable and have a lead on each end that may require soldering..others just simply pop in.You may want to start there....If the unit means a lot to you..please have a tech replace the bulb.....I hope this was heplful......Thanks...

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Can handlebar for ccm vandal xc 26" bicylce be raised? It seems as if stem is confined by top and bottom bearings. Doesn't make sense that seat can be raised but not handlebars.

The threadless stem style you have pre-supposes you chose the right height and reach when you bought the bike. As the steerer tube to which it clamps has to be below flush with the top surface to accomodate the top adjustment cap, the steerer had to be cut to a final length that can't be made longer. The stem CAN be flipped upside down to provide a different rise and reach, but most likely it would be lower and farther away.

One option is to replace the stem with one with an angle and length that would work for you. Have a bicycle shop asist you in choosing one as there are 4 parameters that must be considered.

Another is to get a threadless stem riser which effectively makes the steerer tube taller. Google "threadless stem riser".

Here's one on eBay...

Mar 18, 2011 | Cycling

2 Answers

Raise handle bars

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Oct 05, 2010 | Raleigh Diamondback Joker Bicycle '10

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Raising the handlebars

If your bike is older it might have a quill stem.To raise this you have to undo the allen key headed bolt situated where the bar & stem attach to the bike.It is often obscured by a plastic plug to prevent water rusting the bolt head.If this doesn't go high enough an adjustable quill stem must be fitted.
If you have the modern design of stem(A-head)you will have to replace the stem with an adjustable type which can be set upto 60 degrees.

Sep 29, 2009 | Cycling

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