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Wanting to make my 2013 trek session 88 lighter

xemini

Monkey
Nov 4, 2004
255
0
I'm looking at upgrading my stock 2013 trek session 88 to get it a little lighter for racing. Looking for recommendations as what to get.. Such as wheels, bars,stem? Anything to lighten it up
 

csermonet

Monkey
Mar 5, 2010
942
127
a components list would be helpful, cause im too lazy to look it up. but three components that will save mucho weight are going from coil fork/shock to air, cranks, and wheelset.
 

klunky

Turbo Monkey
Oct 17, 2003
1,078
6
Scotland
The session has a few cheap/heavy bits. Whatever you upgrade them with will likely be better. Start with the stem. That bontrager thing is like pig iron - replace with renthal? Same with bars.
Saddle is a boat anchor too.

Those are cheap options but you could get a ti spring and light bicycle rims if you have money to burn
 

hitar_potar

Monkey
Sep 23, 2011
173
6
Ruse, Bulgaria
Most signifficant upgrade to lighter weight is the wheelset/tyres combo - i shave around 3,5lbs (around 1,5 kg) from my IH Sunday by upgrading the combo. i went with EXO Maxxis tyres, and the custom heavy bomb-proof wheelset dissapeared in favour of a second-hand Easton Havoc UST. The difference was night and day.
Another places to shave grams are the saddle and pedals. If you're willing to pay more, go with a carbon bar, seatpost and lighter DM-stem as well. These are the cheaper ways to lighten the build. If you have a coil Boxxer up front, you can convert it to air. Also, there are multiple choices in the air-shock market (new or used) that are perfect for DH (Vivid Air, Bos Void, CCDB Air, and my choice of riding - Manitou Evolver although it's not so often seen).
You would do good to provide a spec list of your bike as well as putting a budget on your upgrade, so that we could offer you the optimal lightening upgrade possible. :)
 

norbar

KESSLER PROBLEM. Just cause
Jun 7, 2007
11,369
1,605
Warsaw :/
And tires. You can lose over a pound there.
Lightweight tires are a bad idea for anything but slow speed local trails. I have Schwalbes in FR casing but outside of slow trails I have to run higher pressure to keep them predictable.
 
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wheels are light enough so there's not much to be gained there without compromising performance, a ti spring front and rear will chop a nice bit of weight but not cheaply, as has been said before the bars, stem, seatpost, saddle could be upgraded, would swapping the brakes out for a set of formula the ones work for ya?
 

Gary

"S" is for "neo-luddite"
Aug 27, 2002
7,648
5,562
UK
I can tell you, a 34 lb bike handles a whole lot better than a 40 lb bike.And the "take a dump" argument is tired.
Better? Is less durable better, is getting kicked off line because your wheelset is too light better? Are flexy stans rims better? are weak cranks better? Is having to check bolt torques on fragile components better?

Just ride the thing..spending shed loads of cash to save weight won't make you any faster, Sessions are light enough straight off the shelf
 

kidwoo

Artisanal Tweet Curator
Better? Is less durable better, is getting kicked off line because your wheelset is too light better? Are flexy stans rims better? are weak cranks better? Is having to check bolt torques on fragile components better?
It's better than a bunch of assumptions that something lighter is always more pinner. :D


34 is a little silly but his carbon v10 with some enve rims could be pretty light with solid cranks and real dh tires.
 
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norbar

KESSLER PROBLEM. Just cause
Jun 7, 2007
11,369
1,605
Warsaw :/
Better? Is less durable better, is getting kicked off line because your wheelset is too light better? Are flexy stans rims better? are weak cranks better? Is having to check bolt torques on fragile components better?

Just ride the thing..spending shed loads of cash to save weight won't make you any faster, Sessions are light enough straight off the shelf
You do realize you can build a light and durable bike.

As for stans rims - if the wheel build is good everything will be stiff.
 

ianjenn

Turbo Monkey
Sep 12, 2006
3,001
704
SLO
You do realize you can build a light and durable bike.

As for stans rims - if the wheel build is good everything will be stiff.
Wonder how much time would be saved on a 2 minute trail with a 2 lbs weight shavings? A local trail here had a record set in 2000 on it of a 1:42 and it was broken in 2012 with a 1:41 on a 40LBS TR-450 thats 12 years of technology advancement let that sink in for a bit.. The trail is one of the more technical in So Cal.

Would Nate have shaven another second off on a bike that was 2 LBS lighter? Maybe or maybe not....
 

Gary

"S" is for "neo-luddite"
Aug 27, 2002
7,648
5,562
UK
Given that it's rim stiffness that dictates overall wheel stiffness and stans actually stipulate a lower spoke tension when building their rims, HTF do you come to that conclusion norbar?
 

Gary

"S" is for "neo-luddite"
Aug 27, 2002
7,648
5,562
UK
and No, you can't build a durable 34lb DH bike.. Our definition of "durable" clearly differs
 

klunky

Turbo Monkey
Oct 17, 2003
1,078
6
Scotland
Wonder how much time would be saved on a 2 minute trail with a 2 lbs weight shavings? A local trail here had a record set in 2000 on it of a 1:42 and it was broken in 2012 with a 1:41 on a 40LBS TR-450 thats 12 years of technology advancement let that sink in for a bit.. The trail is one of the more technical in So Cal.

Would Nate have shaven another second off on a bike that was 2 LBS lighter? Maybe or maybe not....

Trails often get harder over time. My local trails are way more rooty and rocky than they were 12 years ago.
 

Gary

"S" is for "neo-luddite"
Aug 27, 2002
7,648
5,562
UK
2 second slower to be exact
using your calculations an average 1lb dump should be at least 0.3s per minute faster . does the UCI know about this FACT and is ex-lax on the UCIs list of banned substances?
 

SinatorJ

Monkey
Jul 9, 2002
582
51
AZ
using your calculations an average 1lb dump should be at least 0.3s per minute faster . does the UCI know about this FACT and is ex-lax on the UCIs list of banned substances?
Not the point i was trying to make
 

Gary

"S" is for "neo-luddite"
Aug 27, 2002
7,648
5,562
UK
Sorry, I thought this was the talking bollocks and backing it up with pointless/made up facts Olympics..
 

xemini

Monkey
Nov 4, 2004
255
0
Here are the stock parts list

fork fox 40 steel spring
rear shock rc4 steel spring

Wheels
Sun Ringle ADD Expert, 20mm front, 157x12 rear


Shifters
SRAM X9, 10 speed
Rear derailleur
SRAM X0, Type 2

Crank
Truvativ Descendant DH, 36T

Cassette
SRAM PG-1050 11-26, 10 speed


Saddle
Bontrager Evoke 2, chromoly rails

Seatpost
Bontrager Rhythm Elite, 31.6mm, zero offset

Handlebar
Bontrager Rhythm Elite Low Riser, 31.8mm, 15mm rise

Stem
Truvativ Holzfeller Direct Mount, 31.8mm

Brakeset
Avid Custom CODE 9 hydraulic disc

Money is not a huge issue, but don't want to get too crazy expensive. Thinking about XO carbon dh cranks? lighter saddle? ti springs for fork and rear, I plan on keeping the fox 40 and rc4 Wondering some options for bar and stem? What are some light wheelsets that I would only use for racing and save the stock set for practicing. Was looking at maybe dt swiss 240 and ex500 rims? Or could i just switch my current wheels to tubeless and save a bit of money and weight that way?

I emailed Obtainium springs and they said they have a 450 x 3 inch stroke spring that would fit my fox rc4 but the stroke on my spring now says 450 x 2.8? Would it make a difference?
 
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wiscodh

Monkey
Jun 21, 2007
833
121
303
boxxer WC,
vivid air
enve on dt 240's
x0 dh kit
xtr levers
wtb saddle
enve post
enve bars
enve stem


pretty decent kit, bling bling expensive,

Here are the stock parts list

fork fox 40 steel spring
rear shock rc4 steel spring

Wheels
Sun Ringle ADD Expert, 20mm front, 157x12 rear


Shifters
SRAM X9, 10 speed
Rear derailleur
SRAM X0, Type 2

Crank
Truvativ Descendant DH, 36T

Cassette
SRAM PG-1050 11-26, 10 speed


Saddle
Bontrager Evoke 2, chromoly rails

Seatpost
Bontrager Rhythm Elite, 31.6mm, zero offset

Handlebar
Bontrager Rhythm Elite Low Riser, 31.8mm, 15mm rise

Stem
Truvativ Holzfeller Direct Mount, 31.8mm

Brakeset
Avid Custom CODE 9 hydraulic disc

Money is not an issue so lets have some fun with this. Thinking about XO carbon dh cranks? lighter saddle? ti springs for fork and rear. Wondering some options for bar and stem? What are some light wheelsets that I would only use for racing and save the stock set for practicing. Was looking at maybe dt swiss 240 and ex500 rims? I emailed Obtainium springs and they said they have a 450 x 3 inch stroke spring that would fit my fox rc4 but the stroke on my spring now says 450 x 2.8? Would it make a difference?