Giant Boulder ATX w/Suntour X1
05-31-15, 08:24 AM
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Giant Boulder ATX w/Suntour X1
Giant has pretty good index on all atx and boulder models, but this one is nowhere to be found. One obscure reference in another post where a person thought is was 1990 model. The red/black spatter would date to right around then as I had two treks (89,90) w/ similar paint schemes.
Anyway this was a freebie that looked rough up front. Obviously needs a wheelset though came with decent shimano front wheel. Listed as doubled butted cromo on sticker and has x1 group including f/r derailer, triple crank and diamcompx1 brakes, sr 6061 seatpost. I have redone bb, headset, cleaned, fixed x1 shifters, etc. Obviously needs rear wheel, assume came with suntour 7 cassette or freewheel? Mix of reviews of trying to run shimano or sram on this x1. I would prefer to find wheelset or rear wheel w/ cassette but if any value in x1 parts would also swap them for something else. I remember the early 90s atx line from Giant, they were a bit heavy but seemed very well built.
Anyway this was a freebie that looked rough up front. Obviously needs a wheelset though came with decent shimano front wheel. Listed as doubled butted cromo on sticker and has x1 group including f/r derailer, triple crank and diamcompx1 brakes, sr 6061 seatpost. I have redone bb, headset, cleaned, fixed x1 shifters, etc. Obviously needs rear wheel, assume came with suntour 7 cassette or freewheel? Mix of reviews of trying to run shimano or sram on this x1. I would prefer to find wheelset or rear wheel w/ cassette but if any value in x1 parts would also swap them for something else. I remember the early 90s atx line from Giant, they were a bit heavy but seemed very well built.
Last edited by dailycommute; 05-31-15 at 08:27 AM.
05-31-15, 10:45 AM
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I still have this bike and yes it is a 1990 model. It was my 1st MTB and still a favorite. When I bought it I told the salesguy I wanted something "unbreakable" as I am pretty hard on my equipment. The Suntour components were garbage and I have upgraded to Shimano, shifters, deraileur and replaced tires, wheels and brakes. I love how this bike responds on the trail. It was never a racer, but just fun to ride. I'm not saying this is the ideal project bike or commuter, but it is a keeoer for sure.
02-22-19, 11:13 AM
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Do either of you still have this bike and if so do you know what is the seatpost diameter. I have the exact same frame and am in need of a seatpost. I measured between 29.8 and 30.1 with calipers so I'm not sure whether the seatpost is a 29.8, 30.0, or something else.
02-22-19, 05:04 PM
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
02-22-19, 09:50 PM
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That's the Odyssey Seat Post Sizer, or someone's reproduction of one.
02-23-19, 08:11 AM
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I can't help with the post size but what the OP has is a 1991 model. According to my literature, in 1990 it just the Boulder with Shimano Deore LX. In 1991 it they added the ATX designation and spec'd it with Sun Tour X-1. It was replaced by the Sedona ATX for 1992. The serial number should confirm this and provide the manufacturing date, down to the fortnight. X-1 was 7 speed in 1991.
Last edited by T-Mar; 02-23-19 at 08:16 AM.
02-23-19, 08:35 AM
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hey, well it is long gone but I want to say it was a 30.0 post, odd size for sure. I would contact Giant directly as they used to have all the old catalogs online but do not see them listed anymore.
02-26-19, 07:49 AM
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I’m actually running an X1 rear derailleur on my touring road bike with Superbe Pro accushift downtube levers. I would say that the X1 rear derailleur shifts very well when paired with the correct shifters and an Accushift compatible 7 speed freewheel such as the Winner Pro.
02-26-19, 10:02 AM
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02-26-19, 12:20 PM
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